Flame Failure neon High

Boiler Fault Code Flame Failure neon

Also written as FLAMEFAILURENEON — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed

Fault code Flame Failure neon appears across 3 boiler brands and 5 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 its flame while it was supposed to be running, causing the system to shut down for safety. (As reported on Potterton Osprey CF 125)

Pick your boiler brand for the Flame Failure neon fix

Baxi Flame Failure neon 2 models Halstead Flame Failure neon 1 model Potterton Flame Failure neon 2 models

Source

Information for the Flame Failure neon 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