BoilerFaultCodes 0011 High
Boiler Fault Code 0011
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code 0011 appears across 1 boiler brand 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 has tried to light the flame five times but failed, so it has safely shut itself down to prevent a build-up of unburnt gas. (As reported on Halstead Finest 80)
Pick your boiler brand for the 0011 fix
Source
Information for the 0011 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