BoilerFaultCodes Pilot will not light High
Boiler Fault Code Pilot will not light
Also written as PILOTWILLNOTLIGHT — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code Pilot will not light appears across 2 boiler brands and 2 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 because it cannot start the small flame needed to fire up the main burner. (As reported on Glow-worm Compact (2006-2011))
Pick your boiler brand for the Pilot will not light fix
Source
Information for the Pilot will 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 7 July 2026