How much does it cost to fix boiler error code Combustion lockout?

Typical repair cost for the boiler Combustion lockout fault is £150-300 including labour.

Combustion lockout Emergency

Boiler Fault Code Combustion lockout

Also written as COMBUSTIONLOCKOUT — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 7 July 2026

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

Most common meaning Your boiler has failed to light the flame after several attempts and has shut itself down for safety. (As reported on Ideal Concord Cxdi)

Pick your boiler brand for the Combustion lockout fix

Ideal Combustion lockout 1 model

Source

Information for the Combustion lockout 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