Boiler Fault Code FLAME DETECTED

Also written as FLAMEDETECTED — same fault.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026

Fault code FLAME DETECTED appears across 2 boiler brands 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 thinks it sees a flame even when the gas should be turned off, which prevents it from starting up safely. (As reported on Ariston Egis 24 MFFI)