How much does it cost to fix boiler error code Lock-out lamp?

Typical repair cost for the boiler Lock-out lamp fault is £100-250 including labour.

Lock-out lamp High

Boiler Fault Code Lock-out lamp

Also written as LOCKOUTLAMP — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code Lock-out lamp 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 shut down to protect itself and needs to be manually restarted because the burner has failed to light. (As reported on Firebird Popular Heatpac)

Pick your boiler brand for the Lock-out lamp fix

Firebird Lock-out lamp 1 model

Source

Information for the Lock-out lamp 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