BoilerFaultCodes 234 High
Boiler Fault Code 234
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code 234 appears across 1 boiler brand and 9 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 an electrical problem with the component that controls the gas supply, meaning it cannot safely light the burner to provide heat or hot water. (As reported on Worcester Bosch Greenstar 8000 Life/Style)
Pick your boiler brand for the 234 fix
Source
Information for the 234 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 27 April 2026