IGNITION LOCKOUT INDICATOR High

Halstead IGNITION LOCKOUT INDICATOR Fault Code

Also written as IGNITIONLOCKOUTINDICATOR — same fault.

The Halstead IGNITION LOCKOUT INDICATOR fault code means: your boiler has stopped working because it failed to light the flame, which usually happens due to a blocked flue, a frozen pipe, or a gas supply issue.. It appears on 8 Halstead models 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: Neon illuminates if the boiler fails to light; wait 15 seconds and reset the ignition by depressing the reset button once.
Typical repair cost £120-250 (including labour)

DIY fix possible

Check that your gas supply is turned on at the meterEnsure any other gas appliances are working to rule out a network supply issuePress the reset button once and wait for the boiler to cycle

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Halstead models that show the IGNITION LOCKOUT INDICATOR fault code

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

Source

Halstead IGNITION LOCKOUT INDICATOR 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