Worcester Bosch boiler repairs are our speciality
No Fix No Fee
Free Boiler Service
First Time Fix
If we cannot repair your boiler or it is not economical to repair there will be no call out charge. We will also be able to provide a no-obligation free quote for a replacement boiler.
First Time Fix
Free Boiler Service
First Time Fix
We aim to fix all boilers on the first visit. Our van stocks are tailored to Baxi and Worcester Bosch group boilers meaning we will have up to 99% of your boilers parts.
Free Boiler Service
Free Boiler Service
Free Boiler Service
With every completed Baxi and Worcester Bosch boiler repair as well as fully testing any new parts fitted we are offering a free certified gas service to manufacturers instructions worth up to £90 with a free gas leak and Carbon Monoxide check.
Servicing
We offer a fixed price manufacturer level full strip down service to any Worcester Bosch Boiler for £90 INCLUDING new burner seals and gaskets, ignition probes if required and money saving advice. Our services will keep your manufacturers warranty and prolong the life of your boiler.
Common Worcester Bosch boiler faults in novice user language
Boiler not heating up? Boiler not firing up? Boiler not warming up?
My boiler is not heating up, help! is a common problem we get phoned up with on a daily basis and we will try and talk you through how to fix this problem first over the phone for free, then with a no obligation visit if necessary. If your Worcester boiler is not heating up, or firing up it can sometime be a simple case of 'low pressure' or 'no gas' or a simple switch that's accidentally been switched off. If we can help you over the phone we will as long as you promise to remember us for your next service or repair!
My boiler is leaking? Boiler dripping? Boiler leaking brown liquid?
Another major issue with any combi boiler In Manchester is, my boiler is leaking, my boiler is leaking water or my boiler is leaking brown liquid! Unfortunately this problem is likely to get worse and need an engineer visit. Below will be the link to our repairs team who can help you out at your nearest convenience. We can also offer advice on the safest way to contain the leak and minimise the damage to your Worcester boiler.
My boiler is losing pressure? I keep topping my boiler's pressure up? Keep filling up the boiler?
My boiler is losing pressure? I keep topping my boiler's pressure up? Keep filling up the boiler? Is a very common Worcester combi boiler fault in Manchester and I would say we go to this fault the most. We will advise you to check your radiators and visible pipes for water leaks, even the radiators you think are not in use and can book and appointment below. The most common boiler fault for this is the pressure vessel and safety valve (PRV) and we carry both parts on all our vans for a safe swift repair.
Boiler making a funny sound? Boiler noisy? Boiler banging? Boiler making a kettling sound?
Boiler making a funny sound? Boiler noisy? Boiler banging? Boiler making a kettling sound? Another common boiler fault across Manchester. Common on standard boiler's and combi boilers alike. This can be a troubling fault that scares many of our customers who think their boiler is going to blow up! This could be due to many reasons from the system not having the correct pressure, needing a part or sometimes even needing a flush. Our engineers are on call to help you out with this and get you back up and running safely.
My radiators are not heating up? My central heating is not warming up? My Radiators are cold?
My radiators are not heating up? My central heating is not warming up? My Radiators are cold? With the weather in Manchester we take many calls on this! No one likes a cold house but at repair my Worcester we can have you up and running again in no time with our first time fix offers. We offer special appointments for the vulnerable and elderly and offer call out at all hours if it is essential.
I've no hot water? My hot water isn't working? My water runs hot and cold? My taps are all cold?
I've no hot water? My hot water isn't working? My water runs hot and cold? My taps are all cold? No one likes a cold shower so if you experience any of these problems and you live in the Manchester area, the faster you contact us the better! It can be common in these situations to have central heating and no hot water. This fault will most likely need a reasonably priced part so don't worry and call us now!
My boiler is tripping the electrics? My heating trips the electrics? Boiler knocking off my power?
My boiler is tripping the electrics? My heating trips the electrics? Boiler knocking off my power? In Manchester and the surrounding areas this is a problem with some Worcester boilers. As long as you haven't been doing any DIY near the boiler cables it normally means inside the boiler is a small, mostly hidden leak that is coming into contact with your boilers electric circuit and it is tripping for safety. DO NOT keep trying the boiler or forcing the trip switch up. Call us immediately and we can fix this fault with your free service in under the hour.
Call out boiler faults from our Manchester based customers
Please don't try and remove the cover of your boiler to fix any boiler repair yourself
- The boiler water pressure is too low
- The hot water temperature is fluctuating
- The heating comes on with the hot water
- My boiler is leaking
- My boiler is noisy
- My boiler keeps switching off or knocking off
- My boiler keeps needing resetting
- I have no central heating
- I have no hot water
- My boiler keeps overheating
- My pilot light keeps going out
- The radiators are not fully hot
- My boiler diverter valve is faulty
- I need an emergency plumber
- I think my boiler needs replacing
Gas safe registered engineers available 24/7
Manchester area covered for repairs to Worcester boilers
Areas covered for Worcester Bosch boiler repairs, service and install.
Abram, Ainsworth, Altrincham, Ashton upon Mersey, Ashton-in-Makerfield, Ashton-under-Lyne, Aspull, Astley Bridge, Astley Green, Atherton, Audenshaw, Baguley, Bardsley, Birch, Blackrod, Bleak Hey Nook, Boothstown, Bowdon, Bradshaw, Bramhall, Bredbury, Broadbottom, Broadheath, Broughton, Bryn, Bryn Gates, Burnage, Bury, Cadishead, Calderbrook, Carrington, Castleton, Chadderton, Cheadle, Cheadle, Hulme, Cheesden, Chorlton-cum-Hardy, Clough, Compstall, Crompton Fold, Daubhill, Delph, Denshaw, Denton, Didsbury, Diggle, Droylsden, Dukinfield, Dunham Town, Eagley, Eccles, Egerton, Failsworth, Farnworth, Firgrove, Fishpool, Flixton, Gathurst, Gatley, Gee Cross, Golborne, Gorton, Grasscroft, Greenfield, Greenmount, Haigh, Hale, Halebarns, Harpurhey, Harwood, Haughton Green, Hazel Grove, Heald Green, Heaton Moor, Heaviley, Heyside, Heywood, Higher Blackley, Higher Green, Hindley, Hindley Green, Hollingworth, Hollins, Horwich, Hurst, Hyde, Ince-in-Makerfield, Irlam, Kearsley, Kenyon, Lane Head, Lately Common, Lees, Leigh, Levenshulme, Limefield, Little Hulton, Little Lever, Littleborough, Lostock Junction, Lowton, Lowton Common, Manchester, Marple, Marylebone, Mellor, Micklehurst, Middleton, Milnrow, Moorside, Moss Nook, Mossley, Mottram in Longdendale, Newhey, Newton, Offerton, Oldham,, Orrell, Partington, Pendlebury, Prestolee, Prestwich, Radcliffe, Red Rock, Reddish,, Romiley, Royton, Rusholm, Sale, Salford, Shaw, Shawclough, Shevington, Shevington Moor, Shuttleworth, Slattocks, Smallbridge, Stalybridge, Standish, Stockport, Stretford, Summerseat, Summit, Swinton, Syke, Timperley, Toppings, Tottington, Trafford Park, Tyldesley, Uppermill, Urmston, Walkden, Walmersley, Warburton, Wardle, Westhoughton, Westleigh, Whitefield, Wigan, Wingates, Withington, Wolstenholme, Woodford, Worsley
Servicing
We offer a fixed price manufacturer level strip down service to any Worcester Bosch Boiler for £90 including burner gaskets and probes if needed. Our engineers are highly trained and our services will maintain any remaining boiler warranty. Servicing keeps your boiler safe and maximises the lifespan of the appliance.
Fix / Repair my Worcester Boiler Manchester / Rossendale
Expert Boiler Repair Services
1. CDI Classic Combi / CDI Highflow Combi Boiler Error Codes
Fault CodeSystem BehaviorSolution
A1 Either water is leaking or the pump needs freeing or replacing due to the pump running dry.The best course of action is to bleed your radiators and check your boiler pressure. If the fault code is still showing once you’ve done so, contact Us so someone can take a further inspection.
A7 The hot water negative thermistor coefficient (NTC) sensor is defective – the connecting leads or hot water sensor need checking. Please contact us so someone can take a further inspection.
A8 There has been a break in communication with FX sensor controls. Therefore your electrical connections need checking.Please contact us so someone can take a further inspection.
B1 Code plug not detected Reset the boiler
C6 This means that the fan speed is too low. The fan lead and connector needs an inspection and possibly replacing. Please contact us for a further inspection.
E2 This means that there is a problem with the central heating. The (NTC) sensor might also be defective. Please contact us so someone can take a further inspection.
E9 This means there could be an issue with the system pressure as the safety temperature limiter in the central heating flow has been tripped. If you still see the fault after you’ve pressed ‘reset’ please contact us for a further inspection.
EA There is a problem regarding flame loss. First, you should examine if other gas appliances in your home are working normally so that you know for sure if there is a gas supply in the property. It’s worth checking that the gas supply is on at the meter, if the boiler still doesn’t turn on – then contact us.
F0 This fault code symbolises an internal error within the boiler system.If the fault is still showing after you’ve pressed ‘reset’ please contact us to get a further inspection.
F7A flame has been detected, although the appliance is not on. Don’t be tempted to reset your boiler, instead, contact us for a further inspection.
FA A flame has been detected even after the gas was shut off.The gas valve needs checking. Please contact us to get a further inspection.
FD The ‘reset’ button has been pressed accidentally. Try pressing the ‘reset button again to fix this. However, if the problem persists, contact us to get a further inspection.
2. Worcester Bosch CDI Compact / Greenstar 27/30 I System / Greenstar 25/30 SI Combi Boiler Error Codes
Fault Code System Behavior Solution
T1 The boiler is undertaking an ignition test and is thus in test mode.The boiler normally returns to normal operation once complete. If the problem persists, please contact us for a further inspection.
T2 The boiler is undertaking a fan test and is thus in test mode. The boiler typically returns to normal operation once complete. If not, please contact us for a further inspection.
T3 The boiler is undertaking a pump test and is thus in test mode.The boiler typically returns to normal operation once complete. If not, please contact us for a further inspection.
T4 The boiler is undertaking a three-way valve test and is thus in test mode.The boiler typically returns to normal operation once complete. If not, please contact us to get a further inspection.
T6 The boiler is undertaking an ionisation oscillator test and is thus in test mode. The boiler usually returns to normal operation once complete. If the issue persists, please contact us to get a further inspection.
9A 362 An incorrect Heat Control Module (HCM) was installed. Please contact us to get a further inspection.
C6 215 The fan speed is too high.Turn the boiler’s power off and on again. Once you’ve done this, if your boiler still doesn’t operate correctly, then contact us.
EA 227 1.) No flame has been detected. There could be an issue with the gas valve and may need adjusting or replacing.
2.) Another reason is there could be a blockage in the siphon or the condensate discharge, check not frozen or blocked.
3.) There may also be damage to the ignition or electrode lead; a flame can’t be made without them.
4.) It could also be an internal leak onto an electrical component.
Unfortunately, you cannot fix this yourself, so please contact us for an engineer’s help.
If you spot a leak, turn off your boiler and contact us to get the components replaced.
F7 228 There is a flame error.You should try and reset the system, but contact us for a further inspection if the issue persists.
FA 364 There is a gas valve leak.Turn off your boiler and contact us to send out an engineer.
FB 365 This means there is a gas valve leak. Turn off your boiler and contact us to send out an engineer.
A1 281 The pump is running with air in the system or stuck.Reset your boiler but if the issue persists, contact us for an engineer’s help.
EF 349 The boiler’s operation is at a minimum burner load. Make sure the system pressure is between 1 and 1.5 bar. If the issue persists, then contact us.
NO CODE 212 This means the safety or flow temperature is rising too fast.Reset your boiler but if the error continues then contact us for an engineer.
3. Worcester Bosch CDI Classic Regular Boiler Error Codes
Fault Code System Behavior Solution
B1 Code plug was not detectedIf the fault still shows after you’ve pressed ‘reset’, contact us at repair my Baxi / Worcester Bosch for a further inspection.
C6 Fan speed is too low. The fan lead and connector need inspection and possibly replacing. Please contact us at repair my Baxi / Worcester Bosch for a further inspection.
E2 The central heating (CH) flow negative thermistor coefficient (NTC) sensor is not working properly. Please contact us at repair my Baxi / Worcester Bosch so someone can do a further inspection.
E9 The safety temperature limiter in central heating (CH) flow trippedIf the fault remains after you’ve pressed ‘reset’, contact us at repair my Baxi / Worcester Bosch for a further inspection.
EA Flame not detected You should examine if other gas appliances in your home are working normally, that way you’ll be certain if there is a gas supply in the property.
Check if the gas supply is on at the meter, but if the boiler still doesn’t turn on, contact us at repair my Baxi / Worcester Bosch.
F0 Internal error If the fault remains after you’ve pressed ‘reset, contact us at repair my Baxi / Worcester Bosch for a further inspection.
F7 Flame detected although the appliance is off. Don’t try to reset your boiler. contact us at repair my Baxi / Worcester Bosch for a further inspection instead.
FA Flame detected after gas shut off. The gas valve needs checking. You won’t be able to fix this problem so please contact us at repair my Baxi / Worcester Bosch for a further inspection.
FD The reset button was pressed by mistake Press the ‘reset’ button again. If the problem continues, contact us at repair my Baxi / Worcester Bosch for a further inspection.
4. Worcester Bosch Greenstar I System / Combi Boiler Error Codes
Fault Code System Behavior Solution
226 The service tool is connected in the blocking error history menu. Try and reset your boiler, if the error remains, then contact us at repair my Baxi / Worcester Bosch for an engineer’s help.
FD 231 The power got interrupted during a lockout Reset the boiler
C7 214 The fan does not run during the start-up phase – the fan’s harness connector should be checked. Defective fan – contact us at repair my Baxi / Worcester
C6 215 Fan speed is too high – check the fan harness and connector. Reset the boiler
C7 216 Fan speed is too low – check the fan harness and connector. Reset the boiler
C7 217 The fan has stopped during appliance operation. This isn’t something you’ll be able to fix. contact us at repair my Baxi / Worcester Bosch for an engineer’s help.
C1 264 The fan stopped during operation. Reset the boiler. If the fault remains, contact us at repair my Baxi / Worcester.
C4 273 Due to continuous fan operation for 24 hours, the appliance is temporarily blocked It will shut off to protect the fan.
E2 222 The flow temperature sensor has shorted. Call a boiler engineer.
E2 233 The flow temperature sensor is disconnected. contact us at repair my Baxi / Worcester.
E9 276 Primary flow temperature exceeded 95°C Check that the pressure is between 1.0 and 1.5 bar. Try to reset the boiler, but contact us at repair my Baxi / Worcester Bosch for an engineer’s help if the issue persists.
E2 350 The flow temperature sensor has shorted. Check that the pressure is between 1.0 and 1.5 bar. Try to reset the boiler but if the issue persists, then contact us at repair my Baxi / Worcester Bosch for an engineer’s help.
E2 351 The flow temperature sensor is disconnected. Check that pressure is between 1.0 and 1.5 bar. Try to reset the boiler. If the issue persists, then contact us at repair my Baxi / Worcester Bosch for an engineer’s help.
FA 306 Ionisation was detected after the gas valve closed. Try to reset your boiler but if it doesn’t reset then contact us at repair my Baxi / Worcester Bosch.
EA 227 No ionisation was detected after ignition. Please contact us at repair my Baxi / Worcester Bosch to get an engineer’s help. If you spot a leak, turn off your boiler and contact us at repair my Baxi / Worcester Bosch to get the components replaced.
F7 228 Isioniation current detected before burner start. The best course of action is to reset the system, but please contact us at repair my Baxi / Worcester Bosch to further inspect if the issue persists.
EA 229 Loss of ionisation signal during operation Check the pressure is between 1.0 and 1.5 bar. Try to reset the boiler. If the issue persists, then contact us at repair my Baxi / Worcester Bosch for an engineer’s assistance.
EA 261 The heat control module (HCM) is potentially defective – reset the appliance. Reset the boiler but if the issue remains, you will need to contact us at repair my Baxi / Worcester.
9U 233 The control box or heat control module (HCM) is either loose or defective, the HCM needs to be checked. This isn’t something you’ll be able to fix. contact us at repair my Baxi / Worcester Bosch for an engineer’s help.
C4 237 The heat control module (HCM) or control box is defective contact us at repair my Baxi / Worcester.
F0 238 The boiler is not registering a flame due to a fault in the gas valve or errors in the control box maybe it is incorrect, or its connection is loose. Double-check that the system pressure is between 1.0 and 1.5 bar. Also, check whether other gas appliances are working as normal, to confirm that your gas supply is present. If you’ve done this and your boiler still isn’t operating correctly, then contact us at repair my Baxi / Worcester Bosch.
F0 239 The control box or the heat control module (HCM) is defective – the control box connections should be checked. This may be an electrical issue, so please contact us at repair my Baxi / Worcester Bosch for an engineer’s help.
F0 242 The control box or the heat control module (HCM) is defective – the HCM and control box connections should be checked. This may be an electrical issue, so please contact us at repair my Baxi / Worcester Bosch for an engineer’s help.
B7 257 Control box or the heat control module HCM) is defective- the HCM and control box connections should be checked. Please contact us at repair my Baxi / Worcester Bosch for a further inspection.
F0 258 Control box or the heat control module (HCM) is defective – HCM or control box connections should be checked. This isn’t something you can fix. contact us at repair my Baxi / Worcester Bosch for an engineer’s assistance.
EH 258 When your boiler displays an EH 258 error code it indicates that the HCM which plays a crucial role in regulating the temperature and ensuring the efficiency is defective – HCM or control box connections should be checked. This isn’t something you can fix. contact us at repair my Baxi / Worcester Bosch for an engineer’s assistance. This issue is related internally to the boiler meaning that it should not be solved by yourself, and you will have to contact a gas-safe registered engineer and let us inspect the problem.
F1 259 Control box or the heat control module (HCM) is defective – HCM or control box connections should be checked. This isn’t something you can fix. contact us at repair my Baxi / Worcester Bosch for an engineer’s assistance.
F0 262 Control box or the heat control module (HCM) is defective – HCM or control box connections should be checked. Try resetting your boiler. If that doesn’t fix the problem, then the issue might be internally which you will not be able to fix and will have to contact us at repair my Baxi / Worcester. Also, if you haven’t serviced your boiler for more than 12 months then it is also suggested that you contact us to inspect the boiler to spot future issues before they get more complex.
F1 263 The control box or the heat control module (HCM) is defective – Either the HCM has loosened your boiler, or the wrong control box has been installed. To solve the problem try resetting your boiler if that does not solve the problem then the problem might be complex and cannot be solved by you. For that, you will need to contact us at repair my Baxi / Worcester Bosch for an engineer’s assistance.
F0 272 Control box or the heat control module (HCM) is defective – control box and connections need checking or HCM might not be inserted properly and need replacing. This isn’t something you’ll be able to fix. contact us at repair my Baxi / Worcester Bosch for an engineer’s assistance.
F0 280 Control box or the heat control module (HCM) is defective – control box and connections need checking or HCM might not be inserted properly and need replacing. This isn’t something you’ll be able to fix. contact us at repair my Baxi / Worcester Bosch for an engineer’s assistance.
F0 290 Control box or the heat control module (HCM) is defective – control box and connections need checking or HCM might not be inserted properly and need replacing. This isn’t something you’ll be able to fix. contact us at repair my Baxi / Worcester Bosch for an engineer’s assistance.
328 Control box or the heat control module (HCM) is defective – control box and connections need checking or HCM might not be inserted properly and need replacing. This isn’t something you’ll be able to fix. contact us at repair my Baxi / Worcester Bosch for an engineer’s assistance.
235 Incompatible heat control module (HCM) software versions – control box needs the latest software. Please contact us at repair my Baxi / Worcester Bosch for an engineer’s assistance.
356 Low mains voltage – the voltage may be interrupted or inconsistent so it should be checked. This may require an electrician if it’s an issue with your house mains.
360 Heat control module (HCM) invalid – the inserted HCM does not correspond with the control box. Please contact us at repair my Baxi / Worcester Bosch for an engineer’s assistance.
A8 362 Low mains voltage – the voltage may be interrupted, inconsistent or heat control module (HCM) invalid. This may require an electrician if it’s an issue with your house mains
CC 800 Outdoor sensor defect available when an accessory outdoor sensor is connected. Please contact us at repair my Baxi / Worcester Bosch for an engineer’s assistance.
A1 281 Pump stock or running dry. Try to reset your boiler. If the issue persists, contact us at repair my Baxi / Worcester Bosch to send out an engineer.
E9 224 Flue or high limit thermostat activated. Try to reset your boiler. If the issue persists then contact us at repair my Baxi / Worcester Bosch for a boiler’s assistance.
D4 341 Primary flow temperature rising too fast. This isn’t something you’ll be able to fix. The problem might be related to internal wiring and operation of the pump, trapped air within the system, and problems with circulation within the system. These problems can be best diagnosed and solved by a certified professional, so you must contact us at repair my Baxi / Worcester Bosch for an engineer’s assistance.
5. Worcester Bosch GB162 Boiler Error Codes
Fault Code System Behavior Solution
208 The boiler is in chimney sweep mode. This isn’t something you’ll be able to fix. Please contact us at repair my Baxi / Worcester Bosch for an engineer’s assistance.
200 The boiler is in heating mode. Please contact us at repair my Baxi / Worcester Bosch for an engineer’s assistance.
201 The boiler is currently in domestic hot water (DHW) mode. Please contact us at repair my Baxi / Worcester Bosch for an engineer’s assistance.
202 The boiler is waiting – there was a heat demand from the modulating or on-off control. Please contact us at repair my Baxi / Worcester Bosch for an engineer’s assistance.
203 The boiler is on standby. Please contact us at repair my Baxi / Worcester Bosch for an engineer’s assistance.
204 The boiler is waiting – the actual temperature is higher than the calculated or selected boiler temperature. Please contact us at repair my Baxi / Worcester Bosch for an engineer’s assistance.
212 The temperature recorded by the safety or flow temperature sensor is rising too rapidly. Please contact us at repair my Baxi / Worcester Bosch for an engineer’s assistance.
226 The diagnosis tool was connected and is now locked out. Please contact Worcester Bosch for an engineer’s assistance.
260 The flow temperature sensor doesn’t detect a rise in temperature after a burner start. Please contact us at repair my Baxi / Worcester Bosch for an engineer’s assistance.
265 The boiler is waiting in response to a heat demand – it switches regularly to partial load. Please contact us at repair my Baxi / Worcester Bosch for an engineer’s assistance.
268 Component test phase. Please contact us at repair my Baxi / Worcester Bosch for an engineer’s assistance.
270 The boiler is modulating upwards. Please contact us at repair my Baxi / Worcester Bosch for an engineer’s assistance.
283 The boiler is getting prepared for a burner start – the fan and pump are activated. Please contact us at repair my Baxi / Worcester Bosch for an engineer’s assistance.
284 The gas valve is switched. Please contact us at repair my Baxi / Worcester Bosch for an engineer’s assistance.
305 The boiler is waiting for the domestic hot water (DHW) operation to come to an end. Try to reset the boiler, but contact us at repair my Baxi / Worcester Bosch for an engineer’s assistance if the issue persists.
235 The KIM (boiler identification module) is really new for the burner control unit. Please contact us at repair my Baxi / Worcester Bosch for an engineer’s assistance.
360 The fitted KIM is not compatible with the burner control unit. Please contact us at repair my Baxi / Worcester Bosch for an engineer’s assistance.
9A 361 The fitted burner control unit is not compatible with the KIM (boiler identification module). Please contact us at repair my Baxi / Worcester Bosch for an engineer’s assistance.
9U 233 The control box or heat control module (HCM) is loose or defective. Please contact us at repair my Baxi / Worcester Bosch for an engineer’s assistance.
A3 317 There is a short circuit in the flue gas temperature sensor contacts. Please contact us at repair my Baxi / Worcester Bosch for an engineer’s assistance.
B7 257 The burner control unit or the KIM is defective. Please contact us at repair my Baxi / Worcester Bosch for an engineer’s assistance.
C1 264 No power supply or control signal to the fan during operation. Please contact us at repair my Baxi / Worcester Bosch for an engineer’s assistance.
C4 273 The boiler was switched off for 2 minutes because it had been operating continuously for over 24 hours. Please contact us at repair my Baxi / Worcester Bosch for an engineer’s assistance.
C6 215 Fan speed is too high. Please contact us at repair my Baxi / Worcester Bosch for an engineer’s assistance.
C6 216 Fan speed is too low. Please contact us at repair my Baxi / Worcester Bosch for an engineer’s assistance.
C7 214 The fan does not run during the start phase. Please contact us at repair my Baxi / Worcester Bosch for an engineer’s assistance.
C7 217 When starting up, the fan speed is irregular. Reset the boiler or contact us at repair my Baxi / Worcester Bosch for an engineer.
CE 207 Water pressure is too low. Try to top up the pressure so that the needle is between 1 and 1.5 bar. If the pressure continues to drop, contact us at repair my Baxi / Worcester Bosch as you may have a leak.
CE 266 Pump test failed. Please contact us at repair my Baxi / Worcester Bosch for an engineer’s assistance.
D1 240 The boiler return temperature sensor contacts have short-circuited. Please contact us at repair my Baxi / Worcester Bosch for an engineer’s assistance.
D1 241 The boiler return temperature sensor contacts have interrupted. Please contact us at repair my Baxi / Worcester Bosch for an engineer’s assistance.
D3 232 The external switching contact has opened. Please contact us at repair my Baxi / Worcester Bosch for an engineer’s assistance.
D4 213 The actual temperature recorded by the return or flow temperature sensor is rising too quickly. Please contact us at repair my Baxi / Worcester Bosch for an engineer’s assistance.
D4 271 The actual temperature difference between flow and safety temperature sensor is too high. Please contact us at repair my Baxi / Worcester Bosch for an engineer’s assistance.
D4 286 The boiler return temperature sensor detected a return temperature higher than 105°c. Please contact us at repair my Baxi / Worcester Bosch for an engineer’s assistance.
E2 222 There is a short circuit in the flow temperature sensor contacts. Please contact us at repair my Baxi / Worcester Bosch for an engineer’s assistance.
E2 223 The flow temperature sensor contacts have been interrupted. Please contact us at repair my Baxi / Worcester Bosch for an engineer’s assistance.
E5 218 The temperature captured by the flow temperature sensor is over 105°C. Please contact us at repair my Baxi / Worcester Bosch for an engineer’s assistance.
E9 210 The temperature measured by the flue gas sensor is too high and is open. Please contact us at repair my Baxi / Worcester Bosch for an engineer’s assistance.
E9 219 The safety temperature sensor has captured a temperature over 105°C Please contact us at repair my Baxi / Worcester Bosch for an engineer’s assistance.
E9 220 This means the safety temperature sensor contacts have shorted or the safety temperature sensor has detected a temperature above 130°c. Please contact us at repair my Baxi / Worcester Bosch for an engineer’s assistance.
E9 224 The contacts of the safety temperature sensor have been interrupted. Please contact us at repair my Baxi / Worcester Bosch for an engineer’s assistance.
E9 276 That the primary flow temperature is over 95°C. Please contact Worcester Bosch for an engineer’s assistance.
E9 277 The safety temperature sensor has measured temperature over 95°C Please contact us at repair my Baxi / Worcester Bosch for an engineer’s assistance.
E9 285 the boiler return temperature sensor has measured a temperature higher than 95°c Please contact us at repair my Baxi / Worcester Bosch for an engineer’s assistance.
E9 318 The flue gas temperature sensor contacts are interrupted. Please contact us at repair my Baxi / Worcester Bosch for an engineer’s assistance.
EA 227 An insufficient ionisation current was measured following ignition of the burner. Unfortunately, this isn’t something you’ll be able to fix yourself, so please contact us at repair my Baxi / Worcester Bosch to send out an engineer.
If you spot a leak, turn off your boiler and contact us at repair my Baxi / Worcester Bosch to get the components replaced.
EA 229 The ionisation current detected during the burning phase was insufficient. Check the pressure is between 1.0 and 1.5 bar. Try to reset the boiler, if the issue still persists, then contact us at repair my Baxi / Worcester Bosch for an engineer’s assistance.
EA 234 The gas valve contacts were interrupted. This isn’t something you’ll be able to fix. Please contact us at repair my Baxi / Worcester Bosch for an engineer’s assistance.
EA 261 The burner control unit is faultyTry to reset the boiler but if the issue remains, then contact us at repair my Baxi / Worcester Bosch for an engineer’s assistance.
EA 269 The ignition device has been activated for a long period of timeThis isn’t something you’ll be able to fix. Please contact us at repair my Baxi / Worcester Bosch for an engineer’s assistance.
F0 238 The burner control unit KIM is defective.Double-check to ensure the system pressure is between 1.0 and 1.5 bar. Also check any other gas appliances to see if they are working normally, to confirm that your gas supply is present. If you’ve done this and your boiler still won’t operate correctly, then contact us at repair my Baxi / Worcester Bosch.
F0 239 The burner control unit KIM (boiler identification module) has an error. Cabling may have poor contact breaks and pinching or the wiring and plug of the burner control unit need checking, along with the operating characteristics of the boiler by replacing the burner control unit. This may be an electrical issue, so please contact Worcester Bosch for an engineer’s assistance.
F0 242 – F0 253, and F0 255, F0 259, F0 263, F0 267, F0 272 The burner control unit (KIM) is defective – the wiring of the burner control unit needs to be checked, along with the operating characteristics of the boiler by replacing the burner control unit.This may be an electrical issue, so please contact us at repair my Baxi / Worcester Bosch for an engineer’s assistance.
F0 278 The sensor test failed – plug sensors and cabling need to be checked. This isn’t something you’ll be able to fix. Please contact us at repair my Baxi / Worcester Bosch for an engineer’s assistance.
F0 279 The burner control unit, or KIM, is faulty – the control unit may need replacing. This isn’t something you’ll be able to fix. Please contact us at repair my Baxi / Worcester Bosch for an engineer’s assistance.
F0 280 The burner control unit is faultyThis isn’t something you’ll be able to fix. contact us at repair my Baxi / Worcester Bosch for an engineer’s assistance.
F0 287 The burner control unit, or KIM, has some errorThis isn’t something you’ll be able to fix. Please contact us at repair my Baxi / Worcester Bosch for an engineer’s assistance.
F0 290 The KIM or burner control unit is defective. contact us at repair my Baxi / Worcester Bosch for an engineer’s assistance.
F7 228 An ionisation current was detected before the burner started. The best thing to do is to try and reset the system, if the issue persists then please contact us at repair my Baxi / Worcester Bosch to take a further inspection.
F7 328 A brief power failure has occurred. This isn’t something you’ll be able to fix. Please contact us at repair my Baxi / Worcester Bosch for an engineer’s assistance.
FA 306 An ionisation current was measured after the burner shut off. Try to reset your boiler, if it doesn’t reset then contact us at repair my Baxi / Worcester Bosch.
FD 231 The mains voltage was interrupted due to an interlocking faultTry to reset your boiler, but if the code remains, contact an electrician.
EC 256 The burner control unit has an errorThis isn’t something you’ll be able to fix. Please contact us at repair my Baxi / Worcester Bosch for an engineer’s assistance.
EH 258 The burner control unit is faulty – check the plug and wiring.This isn’t something you’ll be able to fix. contact us at repair my Baxi / Worcester Bosch for an engineer’s assistance.
GB162 The ignition device has been activated for too long.This isn’t something you’ll be able to fix. Please contact us at repair my Baxi / Worcester Bosch for an engineer’s assistance.
H07 The current water pressure is extremely low which limits the performance in heat mode, along with domestic hot water (DHW) modeThis isn’t something you’ll be able to fix. Please contact us at repair my Baxi / Worcester Bosch for an engineer’s assistance.
HrEThe boiler keeps resettingYou need to contact an engineer to fix this problem.
rEThe boiler resetsWait for the boiler to reset, if the issue persists – then please contact Worcester Bosch for an engineer’s assistance.
6. Worcester Bosch Greenstar Ri Boiler Faults Codes
Fault Code System Behavior Solution
No light There is no power at the control board. Try to reset the boiler, but contact us at repair my Baxi / Worcester Bosch for an engineer’s assistance if the issue persists.
Light on Appliance on but not operating during demand. Try to reset the boiler, but contact us at repair my Baxi / Worcester Bosch for an engineer’s help if the issue remains.
Slow flash (mostly off flashes on) Ignition lockout. Try to reset your boiler. This can be done by turning the control knob anti-clockwise to reset the position. If this does not fix the problem then contact us at repair my Baxi / Worcester Bosch for an engineer’s help.
Slow flash (mostly on flashes off) Flue overheats or heat exchangers overheat.Try to reset your boiler. This can be done by turning the control knob anti-clockwise to reset the position. If this does not fix the problem then contact us at repair my Baxi / Worcester Bosch for an engineer’s help.
Fast flash Volatile lockout sensor fan or code plug. Try to reset your boiler. If this does not fix the problem then contact us at repair my Baxi / Worcester Bosch for an engineer’s help.
2 pulses The check-service mode switch is in minimum position. Try to reset your boiler. If this does not fix the problem then contact us at repair my Baxi / Worcester Bosch for an engineer’s help.
5 pulses The Check-service mode switch is in the max position.Try to reset your boiler. If this does not fix the problem then contact us at repair my Baxi / Worcester Bosch for an engineer’s help.
7. Worcester Bosch Greenstar 8000 life Combi Boiler Error Codes
Fault Code System Behavior Solution
200 O The boiler is in heating mode.Try to reset your boiler. If this does not fix the problem then contact us at repair my Baxi / Worcester Bosch for an engineer’s help.
201 O Boiler in hot water mode. Try resetting the boiler. This should fix it.
202 O The boiler is in anti-cycle mode.Try to reset your boiler. If this does not fix the problem then contact us at repair my Baxi / Worcester Bosch for an engineer’s help.
203 0 This means the boiler is on standby – no heat energy demand.Try to reset your boiler. If this does not fix the problem then contact us at repair my Baxi / Worcester Bosch for an engineer’s help.
204 O The current primary water temperature is higher than the set value. Try to reset your boiler. If this does not fix the problem then contact us at repair my Baxi / Worcester Bosch for an engineer’s help.
208 O This shows that the boiler is in chimney sweep demand. Try to reset your boiler. If this does not fix the problem then contact us at repair my Baxi / Worcester Bosch for an engineer’s help
224 V The safety temperature limiter has tripped. Try top-up water until the reset pressure is reached. If the issue persists, then contact us at repair my Baxi / Worcester Bosch for an engineer’s help.
227 V There is no flame signal after the ignition burner. The control unit may need replacing.Try to reset your boiler. If this does not fix the problem then contact us at repair my Baxi / Worcester Bosch for an engineer’s help.
228 V There is a flame signal without a flame present. The air/gas ratio control valve may need to be replaced. Try to reset the boiler. If this does not fix the problem then contact us at repair my Baxi / Worcester Bosch for an engineer’s help.
305 0 The boiler is in hot water anti-cycle mode.Try to reset your boiler. If this does not fix the problem then contact us at repair my Baxi / Worcester Bosch for an engineer’s help.
306 V There is an issue with the flame signal after the fuel supply is closed. The air/gas ratio control valve may need to be replaced.Try to reset your boiler. If this does not fix the problem then contact us at repair my Baxi / Worcester Bosch for an engineer’s help.
815 W/B The low loss header temperature sensor is faulty. Check the sensor port or the differential sensor may be installed incorrectly or damaged.Try to reset your boiler. If this does not fix the problem then contact us at repair my Baxi / Worcester Bosch for an engineer’s help.
1010 O There is no BUS communication cable, EMS-Bus isn’t connected or is damaged – connect the cable for the EMS-Bus or replace the damaged cable exchange fuse. Try to reset your boiler. If this does not fix the problem then contact us at repair my Baxi / Worcester Bosch for an engineer’s help.
1017 W The water pressure is too low – the water needs topping up and the pressure sensor or vent system could need replacing.Try topping up your pressure. If this does not fix the problem then contact us at repair my Baxi / Worcester Bosch for an engineer’s help.
1021 B The hot water temperature sensor is faulty – the plug to the hot water temperature sensor may be disconnected. Try to reset your boiler. If this does not fix the problem then contact us at repair my Baxi / Worcester Bosch for an engineer’s help.
1022 B The hot water storage temperature sensor does not work. Try to reset your boiler. If this does not fix the problem then contact us at repair my Baxi / Worcester Bosch for an engineer’s help.
1037 W The outside temperature sensor is not working – check the connecting lead. Try to reset your boiler. If this does not fix the problem then contact us at repair my Baxi / Worcester Bosch for an engineer’s help.
1065 B The pressure sensor is not connected or defective – check the pressure sensor connection because it may need to be replaced. Try to reset your boiler. If this does not fix the problem then contact us at repair my Baxi / Worcester Bosch for an engineer’s help.
1068 W The outside temperature sensor does not work – check the connecting lead. Try to reset your boiler. If this does not fix the problem then contact us at repair my Baxi / Worcester Bosch for an engineer’s help.
1073 W The temperature sensor may need replacing. Try to reset your boiler. If this does not fix the problem then contact us at repair my Baxi / Worcester Bosch for an engineer’s help.
1074 W No signal from the flow temperature sensor available – connect the plug to the flow temperature sensor correctly or the temperature sensor might need to be replaced. Try to reset your boiler. If this does not fix the problem then contact us at repair my Baxi / Worcester Bosch for an engineer’s help.
1075 W Short circuit of the temperature sensor at the heating block – temperature sensor may need replacing. Try to reset your boiler. If this does not fix the problem then contact us at repair my Baxi / Worcester Bosch for an engineer’s help.
1076 W There is no signal from the temperature sensor at the heating block available – replace the temperature sensor, the connecting lead or the control unit. Try to reset your boiler. If this does not fix the problem then contact us at repair my Baxi / Worcester Bosch for an engineer’s help.
2920 V Error with the flame monitoring. Try to reset your boiler. If this does not fix the problem then contact us at repair my Baxi / Worcester Bosch for an engineer’s help.
2924 V No feedback from the modulating gas valve. The gas valve relay is defective. Try to reset your boiler. If this does not fix the problem then contact us at repair my Baxi / Worcester Bosch for an engineer’s help.2925 V Feedback from the modulating gas valve is too low. Try to reset your boiler. If this does not fix the problem then contact us at repair my Baxi / Worcester Bosch for an engineer’s help.
2927 B The flame failed during the burner operation. Try to reset your boiler. If this does not fix the problem then contact us at repair my Baxi / Worcester Bosch for an engineer’s help.
2946 V The incorrect code plug has been detected – it needs replacing. Try to reset your boiler. If this does not fix the problem then contact us at repair my Baxi / Worcester Bosch for an engineer’s help.
2948 B There is no flame signal. If the fault occurs, again and again, the setting of the CO2 valves need to be checked.Try to reset your boiler. If this does not fix the problem then contact us at repair my Baxi / Worcester Bosch for an engineer’s help.
2950 B There is no flame signal. Try to reset your boiler. If this does not fix the problem then contact us at repair my Baxi / Worcester Bosch for an engineer’s help.
2963 B The signal from the heat exchanger and the flow temperature sensor is outside of range. Try to reset your boiler. If this does not fix the problem then contact us at repair my Baxi / Worcester Bosch for an engineer’s help.
2964 B The flow rate in the heat exchanger is too low. Try to reset your boiler. If this does not fix the problem then contact us at repair my Baxi / Worcester Bosch for an engineer’s help.
2965 B The flow temperature is too high. Try to reset your boiler. If this does not fix the problem then contact us at repair my Baxi / Worcester Bosch for an engineer’s help.
966 B The flow temperature rise in the heat exchanger is very rapid. Try to reset your boiler. If this does not fix the problem then contact us at repair my Baxi / Worcester Bosch for an engineer’s help.
2967 B The heat/flow exchanger temperature sensor differential is too great. Try to reset your boiler. If this does not fix the problem then contact us at repair my Baxi / Worcester Bosch for an engineer’s help.
2970 B The pressure drop in the heating system is too fast. Try to reset your boiler. If this does not fix the problem then contact us at repair my Baxi / Worcester Bosch for an engineer’s help.
2971 B The system pressure is too low – the heating system needs venting or water needs topping up until the preset pressure is reached.To fix, replace the cable to the pressure sensor and replace the pressure sensor. Otherwise, try to reset your boiler. If this does not fix the problem then contact us at repair my Baxi / Worcester Bosch for an engineer’s help.
8. Worcester 4000 Error Codes
1021 Indicates faulty cylinder charging or hot water temperature sensor. Turn off the boiler and check for open or short circuit in the hot water sensor. Refit the sensor if it has fallen off the pipe.
224 Indicates system overheating, causing it to stop operating.contact us at repair my Baxi / Worcester Bosch for engineer assistance. This may indicate a software or internal issue requiring expert diagnosis and repair.
What do the error symbols indicate on my Worcester boiler?
Symbol 1: Siphon fill mode:
This error indicates that the boiler hasn’t been used for a day or two due to which the control knob has been turned down and backed up. This is perfectly normal as it is a safety feature of the boiler making the boiler run at a low burn for 15 minutes to fill the condense trap.
All you need to do is wait for 15 minutes as the boiler will be back to normal, if it takes more than 15-30 minutes then contact us at repair my Baxi / Worcester Bosch.
Symbol 2: Keylock (Child Lock):
This symbol indicates that the front panel has been locked (This feature is only available in new Greenstar 24/28 only)
Symbol 3: –
This symbol indicates that one key has been pressed.
Symbol 4:
This symbol indicates that two keys have been pressed at once.
Symbol 5:
This symbol indicates that the boiler is operating in maximum mode. All you need to do is leave the boiler alone for 15 minutes and will be back to normal.
If the problem persists let’s say more than 15 minutes and up to 30 minutes, then contact us at repair my Baxi / Worcester Bosch for assistance.
Symbol 6:
This symbol means that the boiler is operating within a set range (service function 1A).
Symbol 7:
This means the boiler is operating in minimum mode. And it should not last longer than 15 minutes if it does then contact us at repair my Baxi / Worcester Bosch for assistance.
Symbol 8:
This symbol indicates air purge mode, meaning the boiler will not fire up instead it will pulse the pump on and off. This happens mainly due to when the boiler is first switched on or if a circuit board is changed.
This air purge mode will also last 15 minutes in your boiler and will then return to its normal operation if it’s not then contact us at repair my Baxi / Worcester Bosch for assistance.
Symbol 9:
This symbol is known as the save function it is only displayed on the screen when adjustments are made in the menu.
Symbol 10:
This symbol indicates temperature blocking mode also known as gradient limitation. This happens when the boiler is programmed to increase its flow temperature by a certain rate “degrees” and it exceeds that rate. Due to this, the symbol appears on the screen and the burner stops functioning for a few minutes and then restarts afterwards.
This is an indication that the temperature is increasing quickly not necessarily overheating but can mean issues with the circulation. If the system does not reset and the issues persist either contact us at repair my Baxi / Worcester Bosch for assistance.
Symbol 11:
When this symbol arises, the display will flash between this symbol and the flow temperature indicating that the service is due, so get serviced immediately to prevent the chances of breakdown.
Symbol 12:
When this symbol arises the display flashes between the symbols indicating that the heating circuit pump is blocked. Either contact us at repair my Baxi / Worcester Bosch.
Symbol 13:
This is an SE code which is not an error code but indicates that the boiler has been operating for 2324 hours which is accumulative to 12-month periods and due a service. Arrange a boiler service right away.
Frequently Asked Questions (FAQs)
Why is my Worcester Boiler Flashing?
There are three kinds of lights on the Worcester boiler and each one indicates something different. The green light, for instance, typically indicates that the burner is operating properly, which means it is a good sign. However, sometimes even with the boiler working fine, the green light can go off. There are reasons for this, for instance, LED or PCB failure, mainly the things that power the light on the boiler’s panel.
The blue light indicates that the boiler has power going to it. There may be reasons why the blue light is not showing; for instance, LED and PCB failure. Additionally, it could also point to socket failure – it is worth checking a few of the appliances with the same socket the boiler is usually plugged into in the house and see if they are working okay.
Why is my Boiler Flashing EA?
The EA fault code indicates the need for activation of a safety device to prevent any gas from being let out when the boiler has failed to light.
What does U2 mean on a Worcester Boiler?
This code means that the boiler flow temperature is too high and the boiler will shut down until it has cooled down.
What does the Worcester Bosch fault code U9 mean?
U9 means the temperature is 109 degrees as measured inside the boiler. The boiler has massively overheated. This is either due to a faulty pump not working, a restriction in the plate heat exchanger or a faulty PCB not sending power to the pump.
What does the fault code h09 means on my Worcester Bosch boiler?
H09 fault code on your Worcester boiler means that your boiler is providing no heating and hot water caused by a communication problem between the pump and the printed circuit board. To solve this problem try resetting your boiler as the problem might be due to a glitch.
If this does not solve the issue, then the problem might be related to the central heating pump and PCB which unfortunately cannot be solved by yourself and will require the expertise of a gas-safe engineer who will inspect the pump and PCB. Contact Worcester Bosch for an engineer’s help.
What does A22 Fault Code mean on Worcester Bosch boiler?
If your Worcester boiler displays an A22 Fault Code, this indicates a loss of RF signal due to incorrect positioning of the room thermostat. To solve the problem, check the signal strength and try repositioning the room thermostat to get better signals. If the boiler is in a loft garage, try wiring the receiver to a wall plate.
What does 6A fault code means on Worcester Bosch boiler?
Fault code 6a on your Worcester Boiler indicates that the safety fuse has run out. This happens mainly due to tampering within the system, or poor maintenance. Also, poor, or loose wiring can be another issue that causes damage. As it is an internal issue to solve the problem you will need to contact a certified gas-safe engineer.
After inspecting the severity of the problem through procedural testing the professional will then recommend you necessary solutions. Although it is recommended that you contact us at repair my Baxi / Worcester Bosch for an engineer’s assistance as they will have service performed on an annual basis so that errors like 6a can be potentially avoided in the future. You can trust us to get the job done right the first time.
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