BoilerFaultCodes PILOT WILL NOT STAY ALIGm Emergency
Boiler Fault Code PILOT WILL NOT STAY ALIGm
Also written as PILOTWILLNOTSTAYALIGM — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code PILOT WILL NOT STAY ALIGm 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's pilot light is failing to remain lit, which prevents the main heating system from starting up safely. (As reported on Chaffoteaux Britony II 30FF)
Pick your boiler brand for the PILOT WILL NOT STAY ALIGm fix
Source
Information for the PILOT WILL NOT STAY ALIGm 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