Neon1 High

Boiler Fault Code Neon1

Also written as NEON1 — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed

Fault code Neon1 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 lost power or has insufficient water pressure to operate safely, meaning it cannot provide heating or hot water until reset. (As reported on Glow-worm Fuelsaver Complheat 40 55)

Pick your boiler brand for the Neon1 fix

Source

Information for the Neon1 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