How much does it cost to fix boiler error code Main burner not operating?

Typical repair cost for the boiler Main burner not operating fault is £150-300 including labour.

Main burner not operating High

Boiler Fault Code Main burner not operating

Also written as MAINBURNERNOTOPERATING — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code Main burner not operating appears across 1 boiler brand 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 the main flame because of a problem with the internal electronics or wiring that controls the fuel supply. (As reported on Saunier Duval Xeon 120 FF)

Pick your boiler brand for the Main burner not operating fix

Saunier Duval Main burner not operating 2 models

Source

Information for the Main burner not operating 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