fuse blown High
Boiler Fault Code fuse blown
Also written as FUSEBLOWN — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code fuse blown appears across 1 boiler brand and 1 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler has lost power completely because an internal electrical safety fuse has popped, likely due to a wiring fault. (As reported on Ideal Classic NF)
Pick your boiler brand for the fuse blown fix
Source
Information for the fuse blown 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