Main burner does not light High

Boiler Fault Code Main burner does not light

Also written as MAINBURNERDOESNOTLIGHT — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed

Fault code Main burner does not light appears across 5 boiler brands and 10 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 main gas flame, which means your heating and hot water will not work. (As reported on Ideal Classic FF)

Pick your boiler brand for the Main burner does not light fix

Chaffoteaux Main burner does not light 5 models Glow-worm Main burner does not light 2 models Ideal Main burner does not light 1 model Potterton Main burner does not light 1 model Saunier Duval Main burner does not light 1 model

Source

Information for the Main burner 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