How much does it cost to fix boiler error code Burner lock-out?

Typical repair cost for the boiler Burner lock-out fault is £120-250 including labour.

Burner lock-out High

Boiler Fault Code Burner lock-out

Also written as BURNERLOCKOUT — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 7 July 2026

Fault code Burner lock-out appears across 1 boiler brand and 8 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler's heating element has safely shut itself down as a precaution, usually due to a temporary interruption in the ignition process. (As reported on Grant Vortex Eco External Wall Hung)

Pick your boiler brand for the Burner lock-out fix

Grant Burner lock-out 8 models

Source

Information for the Burner lock-out 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