BoilerFaultCodes 2974 High
Boiler Fault Code 2974
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code 2974 appears across 1 boiler brand and 6 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler's computer is experiencing an internal error and cannot operate correctly, which means you currently have no heating or hot water. (As reported on Worcester Bosch 1000)
Pick your boiler brand for the 2974 fix
Source
Information for the 2974 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