BoilerFaultCodesHalstead 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 1 Halstead model in our database.
Technical description: Neon illuminates if the boiler fails to light; wait 15 seconds and reset the ignition by depressing the reset button once.
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 7 July 2026