BoilerFaultCodes 6901 High
Boiler Fault Code 6901
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code 6901 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 is having trouble controlling the gas flow required to maintain a flame, which has caused it to stop heating your water and radiators. (As reported on Vokera Maxin)
Pick your boiler brand for the 6901 fix
Source
Information for the 6901 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