BoilerFaultCodesHalstead Ignition Lock-out Fault Code
Also written as IGNITIONLOCKOUT — same fault.
The Halstead Ignition Lock-out fault code means: your boiler has stopped working because it failed to light the flame, so it has purposefully shut down for safety.. It appears on 2 Halstead models in our database.
Technical description: Occurs if the burner fails to light. The safety Lock-out LED will be illuminated. Requires reset via Main Switch.
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 Ignition Lock-out fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Halstead Ignition Lock-out 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