Pilot does not light High

Boiler Fault Code Pilot does not light

Also written as PILOTDOESNOTLIGHT — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed

Fault code Pilot does not light appears across 4 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 is failing to ignite the small starter flame, which means the main burner cannot catch light to provide heating or hot water. (As reported on Ideal Classic FF)

Pick your boiler brand for the Pilot does not light fix

Glow-worm Pilot does not light 2 models Ideal Pilot does not light 1 model Potterton Pilot does not light 1 model Saunier Duval Pilot does not light 1 model

Source

Information for the Pilot does not light 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