BoilerFaultCodes Gas On Low
Boiler Fault Code Gas On
Also written as GASON — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code Gas On appears across 1 boiler brand and 2 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler is currently operating normally as it is in the process of burning gas to heat your water or home. (As reported on Potterton Envoy Plus)
Pick your boiler brand for the Gas On fix
Source
Information for the Gas On 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