BoilerFaultCodes 254 High
Boiler Fault Code 254
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code 254 appears across 3 boiler brands and 10 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler's internal computer is experiencing a memory error, meaning it has lost its stored settings and cannot safely manage its operations. (As reported on Worcester Bosch Greenstar 1000)
Pick your boiler brand for the 254 fix
Source
Information for the 254 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