BoilerFaultCodesGlow-worm Ignition Lockout Fault Code
Also written as IGNITIONLOCKOUT — same fault.
The Glow-worm Ignition Lockout fault code means: your boiler has stopped trying to light because it failed to detect a flame, meaning you currently have no heating or hot water.. It appears on 2 Glow-worm models in our database.
Technical description: Ignition Lockout
DIY fix possible
Check if other gas appliances in your home are working to confirm your gas supply is on.Locate the reset button on your Glow-worm Micron 80 FF and hold it down for up to 5 seconds to try and restart the boiler.Check that your pre-payment gas meter has credit if applicable.
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A cover plan would handle faults like Ignition Lockout: no call-out fees, no surprise bills.
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Glow-worm models that show the Ignition Lockout fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Glow-worm Ignition Lockout fault code information on this page is sourced and cross-checked against the official Glow-worm service / installation manuals for each affected model.
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 31 August 2026