BoilerFaultCodes 274 High
Boiler Fault Code 274
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code 274 appears across 2 boiler brands and 4 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler has detected that it is still sensing a flame even when it should be turned off, which may indicate a build-up of residue or a sensitive sensor. (As reported on Worcester Bosch Greenstar CDi Compact)
Pick your boiler brand for the 274 fix
Source
Information for the 274 fault code is sourced from the official service / installation manual for each model that displays it. Read more about how we source fault codes →
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 31 August 2026