How much does it cost to fix boiler error code Lock-out (Steady light)?

Typical repair cost for the boiler Lock-out (Steady light) fault is £120-250 including labour.

Lock-out (Steady light) High

Boiler Fault Code Lock-out (Steady light)

Also written as LOCKOUTSTEADYLIGHT — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code Lock-out (Steady light) appears across 1 boiler brand and 4 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 that it is getting too hot and has automatically shut down for safety to prevent damage. (As reported on Worcester Bosch 24i/28i Junior)

Pick your boiler brand for the Lock-out (Steady light) fix

Worcester Bosch Lock-out (Steady light) 4 models

Source

Information for the Lock-out (Steady light) 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