How much does it cost to fix Halstead error code RED LED ON?

Typical repair cost for the Halstead RED LED ON fault is £120-250 including labour.

RED LED ON High

Halstead RED LED ON Fault Code

Q: What does the Halstead RED LED ON fault code mean?

Your boiler has stopped working because it has failed to start properly or has become too hot and turned itself off as a safety precaution.

Also written as REDLEDON — same fault.

The Halstead RED LED ON fault code means: your boiler has stopped working because it has failed to start properly or has become too hot and turned itself off as a safety precaution.. It appears on 1 Halstead model in our database.

Technical description: Ignition lockout or Overheat thermostat trip

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 RED LED ON fault code

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

Ace High Repair: £120-250

Source

Halstead RED LED ON 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