How much does it cost to fix boiler error code Neon 2 NOT lit?

Typical repair cost for the boiler Neon 2 NOT lit fault is £180-450 including labour.

Neon 2 NOT lit High

Boiler Fault Code Neon 2 NOT lit

Also written as NEON2NOTLIT — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code Neon 2 NOT lit appears across 2 boiler brands and 9 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler has switched itself off to prevent overheating because the system is getting too hot or the water is not circulating properly. (As reported on Glow-worm Space Saver Compleheat 30 40 50)

Pick your boiler brand for the Neon 2 NOT lit fix

Glow-worm Neon 2 NOT lit 7 models Saunier Duval Neon 2 NOT lit 2 models

Source

Information for the Neon 2 NOT lit 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