Ignition lockout High

Gledhill Ignition lockout Fault Code

Also written as IGNITIONLOCKOUT — same fault.

The Gledhill Ignition lockout fault code means: your boiler has tried to start three times but hasn't been able to light the flame, so it has shut down for safety.. It appears on 1 Gledhill model in our database.

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

Technical description: If the burner fails to light after 3 ignition attempts, ignition lockout will occur. To reset the appliance the central button (S1) beneath the display should be pressed.
Typical repair cost £100-£250 (including labour)

DIY fix possible

Check that your gas pre-payment meter (if you have one) has credit.Ensure your external gas emergency control valve is turned to the 'on' position.Press the central button (S1) beneath the boiler display to attempt a reset.

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Gledhill models that show the Ignition lockout fault code

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

Source

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

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026