Boiler fault codes
Choose your boiler brand, then the code on the display. See what it means, what you can safely check yourself and when to call an engineer.
Vaillant boiler fault codes
F.22Water pressure too lowF.28Ignition failure, no flame detectedF.29Flame lost during operationF.25Flue (exhaust) faultF.32Fan faultF.61Gas valve faultF.64Control system errorF.73Water level (pressure) sensor faultF.10Temperature sensor (thermistor) faultF.89Pump fault
Glow-worm boiler fault codes
F22Water pressure too lowF28No ignition: gas supply problem or frozen condensate pipeF61Control system error
Worcester Bosch boiler fault codes
EA 227Ignition failure, no flame detectedE9 224Overheating (safety limit tripped)A1 281Pump faultC6 215Fan faultD1 240Temperature sensor (thermistor) faultE2 222Temperature sensor (thermistor) faultF7 228False flame detectedFA 306False flame detectedFD 231Power supply interrupted1017Water pressure too low
Baxi boiler fault codes
E133Ignition failure, no flame detectedE118Water pressure too lowE117Water pressure too highE110Overheating (safety limit tripped)E125Water circulation faultE160Fan faultE28Flue (exhaust) faultE20Temperature sensor (thermistor) faultE384False flame detectedE15Gas valve fault