BoilerFaultCodes Electrical Supply Failure High
Boiler Fault Code Electrical Supply Failure
Also written as ELECTRICALSUPPLYFAILURE — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code Electrical Supply Failure appears across 1 boiler brand 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 it has lost its electricity supply, but it should restart automatically once the power is back on. (As reported on Glow-worm Hideaway 40B)
Pick your boiler brand for the Electrical Supply Failure fix
Source
Information for the Electrical Supply Failure 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