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

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

Safety Lock-out LED High

Halstead Safety Lock-out LED Fault Code

Q: What does the Halstead Safety Lock-out LED fault code mean?

Your boiler has stopped working because it failed to light or has become too hot, causing a safety shutdown to protect your home.

Also written as SAFETYLOCKOUTLED — same fault.

The Halstead Safety Lock-out LED fault code means: your boiler has stopped working because it failed to light or has become too hot, causing a safety shutdown to protect your home.. It appears on 2 Halstead models in our database.

Technical description: Illuminated in the event of an ignition failure or an overheat condition.

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 Lock-out LED fault code

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

Source

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

Halstead Ace 100 manual (PDF)

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 31 August 2026