BoilerFaultCodes 6C Emergency
Boiler Fault Code 6C
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code 6C appears across 2 boiler brands and 5 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler is still detecting a flame even after it should have turned off, which suggests gas may still be flowing into the unit when it shouldn't be. (As reported on Ideal Maximiser SE)
Pick your boiler brand for the 6C fix
Source
Information for the 6C 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