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

Typical repair cost for the boiler Safety Lock-out LED fault is £120-250 including labour.

Safety Lock-out LED High

Boiler Fault Code Safety Lock-out LED

Also written as SAFETYLOCKOUTLED — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code Safety Lock-out LED appears across 1 boiler brand and 2 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 light or has become too hot, causing a safety shutdown to protect your home. (As reported on Halstead Ace)

Pick your boiler brand for the Safety Lock-out LED fix

Halstead Safety Lock-out LED 2 models

Source

Information for the Safety Lock-out LED 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