BoilerFaultCodesPro Ignition Lockout Fault Code
Also written as IGNITIONLOCKOUT — same fault.
The Pro Ignition Lockout fault code means: your boiler has failed to light the gas flame and has shut itself down for safety.. It appears on 1 Pro model in our database.
Technical description: If other appliances do not work or there are no other appliances, check the gas supply is on at the meter and/or pre payment meter has credit. If the boiler fails to operate then please contact Procombi (if under warranty) or alternatively a Gas Safe Registered Engineer if outside of the warranty period.
DIY fix possible
Check if other gas appliances, like a hob, are working to ensure gas is reaching the property.Verify that your gas meter has credit and the isolation valve is in the 'on' position.Press the reset button on the boiler control panel once to see if it restarts.
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Pro models that show the Ignition Lockout fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Pro Ignition Lockout fault code information on this page is sourced and cross-checked against the official Pro service / installation manuals for each affected model.
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026