How much does it cost to fix boiler error code Safety Lockout LED (Red)?

Typical repair cost for the boiler Safety Lockout LED (Red) fault is £120-250 including labour.

Safety Lockout LED (Red) High

Boiler Fault Code Safety Lockout LED (Red)

Also written as SAFETYLOCKOUTLEDRED — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code Safety Lockout LED (Red) 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 stopped working because it failed to start the burner, meaning you currently have no heating or hot water. (As reported on Halstead Ace High)

Pick your boiler brand for the Safety Lockout LED (Red) fix

Halstead Safety Lockout LED (Red) 1 model

Source

Information for the Safety Lockout LED (Red) 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