How much does it cost to fix boiler error code Lockout button lit?

Typical repair cost for the boiler Lockout button lit fault is £120-250 including labour.

Lockout button lit High

Boiler Fault Code Lockout button lit

Also written as LOCKOUTBUTTONLIT — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code Lockout button lit appears across 1 boiler brand and 5 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler has detected an issue preventing it from lighting and has shut down for safety; it needs a manual reset to try and start again. (As reported on Grant Vortex Eco)

Pick your boiler brand for the Lockout button lit fix

Grant Lockout button lit 5 models

Source

Information for the Lockout button lit 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