FUSE High
Boiler Fault Code FUSE
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code FUSE appears across 2 boiler brands and 3 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler has stopped working because an internal electrical safety fuse has blown, meaning the system is unable to power its own electronic controls. (As reported on Alpha SY9 24)
Pick your boiler brand for the FUSE fix
Source
Information for the FUSE 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 7 July 2026