Worcester Bosch Boiler Faults & Errors by Expert Worcester Bosch Boiler Engineers - Book an Engineer.
The EA229 & D5 error codes are very common faults on the Worcester Bosch boiler. If you get this code displaying on the boiler display then this will be a blocked condensate pipe. You can do a DIY fix or you can contact one of our engineers who would be happy to help, Call one of our Worcester Bosch boiler engineers.
If you have no hot water but the heating works then you have a faulty diverter valve. But, it could also be due to a lack of power, a stuck Y valve, faulty PCB unit, or even a problem with the heating pump. Contact one of our engineers who would be happy to help and solve the problem, Call one of our Worcester Bosch boiler engineers.
|Fault/Error Code||Possible Cause|
|9A 362||Error - Incorrect Heat Control Module (HCM) fitted or communication issue.|
|9U 233||Error - Heat Control Module Error. Code plug problem or communication issue.|
|B7 257||Internal error - (PCB) Possible control board problem. Printed circuit board (PCB) failure.|
|C6 215||Fan problem - PCB detected the fan is running too fast.|
|C7 214||Fan problem - PCB detected the fan is not running.|
|D1 240||Sensor error - Return sensor may be wet or damaged.|
|E2 222||Sensor error - Flow sensor short circuit error.|
|E5 218||Temperature - Flow temperature too high.|
|E9 219||Sensor error - Temperature too high, sensor short circuit or open circuit.|
|EA 227||No flame - flame signal loss during operation.|
|F0 237||Internal error - Internal error.|
|F7 228||Flame error - False flame or flame detected before burner started. The flame sensor senses flame by passing a small electric current. Error.|
|FA 306||Flame error - False flame fault – flame detected after burner stop.|
|FD 231||Mains power fault - Electrical power interruption.|
|FA 364||Gas valve leak - EV2 leak test failed. Gas valve leak.|
|FB 365||Gas valve leak - EV2 leak test failed. Gas valve leak.|
|A1 281||Pump fault - Pump stuck or running with air in the system|
|C1 264||Airflow error - Airflow stopped during operation.|
|C4 273||Airflow error - Airflow present during last 24 hour.|
|D1 240||Sensor error - Return sensor short circuit.|
|D4 271||Temperature fault - Temperature difference between flow and safety sensor exceeds limit.|
|E9 224||Overheat - Max thermostat activated – flue gas thermostat overheat. Blockage on pipe/filter or faulty pump.|
|EA 227||Ignition - No ionisation detected after ignition.|
|EF 349||Central heating - Central heating boil detected – boiler operating at minimum burner load with temperature difference greater than 18°C between Flow and Return.|
|212||Temperature - Safety or flow temperature rising too fast.|
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