Safety lockout LED Emergency

Halstead Safety lockout LED Fault Code

Also written as SAFETYLOCKOUTLED — same fault.

The Halstead Safety lockout LED fault code means: your boiler has detected that it is running too hot and has automatically turned itself off to prevent damage or potential danger.. It appears on 1 Halstead model in our database.

Act immediately

Turn off your boiler and stop using gas appliances. Call a Gas Safe engineer now. This fault can be dangerous if ignored.

Technical description: Continuous light indicates an overheat condition has occurred and the appliance has shut down.
Typical repair cost £120-250 (including labour)

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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Halstead models that show the Safety lockout LED fault code

Click a model for the full fault code list and model-specific repair notes.

Source

Halstead Safety lockout LED fault code information on this page is sourced and cross-checked against the official Halstead service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026