BoilerFaultCodes NEON3 High
Boiler Fault Code NEON3
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code NEON3 appears across 2 boiler brands and 14 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 thinks the fan is spinning but it isn't receiving the correct signal to proceed with lighting the burner. (As reported on Glow-worm Micron 30ff)
Pick your boiler brand for the NEON3 fix
Source
Information for the NEON3 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