BoilerFaultCodes GM001 Low
Boiler Fault Code GM001
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code GM001 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 displaying a status report showing the current speed of the internal fan rather than an active fault, indicating the system is likely operating normally. (As reported on Baxi 400 Combi 2)
Pick your boiler brand for the GM001 fix
Source
Information for the GM001 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