Boiler Fault Code Burner On neon off

Also written as BURNERONNEONOFF — same fault.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026

Fault code Burner On neon off appears across 1 boiler brand and 4 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler's burner stays lit even when it should turn off, meaning it isn't responding to your thermostat or timer settings. (As reported on Glow-worm Micron 30ff)