Ignition lockout High

Ideal Ignition lockout Fault Code

Also written as IGNITIONLOCKOUT — same fault.

The Ideal Ignition lockout fault code means: your boiler has stopped working because it failed to light the flame after several attempts, typically due to a temporary interruption in the gas supply.. It appears on 8 Ideal 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: Check gas appliances work and restart boiler.
Typical repair cost £100-£350 (including labour)

DIY fix possible

Check that other gas appliances, such as a gas hob, are working correctly to confirm gas supply.Ensure your gas meter has credit if you are on a prepay system.Press and hold the reset button for five seconds to restart the ignition sequence.

Find a Gas Safe engineer

Search the official register for a qualified engineer in your area.

Gas Safe Register →

Ideal models that show the Ignition lockout fault code

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

Source

Ideal Ignition lockout fault code information on this page is sourced and cross-checked against the official Ideal service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026