BoilerFaultCodes A fault on gas supply High
Boiler Fault Code A fault on gas supply
Also written as AFAULTONGASSUPPLY — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code A fault on gas supply 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 has stopped working because it cannot detect a steady supply of gas or a flame. (As reported on Biasi Riva Compact HE M96a)
Pick your boiler brand for the A fault on gas supply fix
Source
Information for the A fault on gas supply 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