Ignition Lockout High

Baxi Ignition Lockout Fault Code

Also written as IGNITIONLOCKOUT — same fault.

The Baxi Ignition Lockout fault code means: your boiler has stopped working because it couldn't light the flame, so it has safely shut itself down to prevent gas from building up.. It appears on 5 Baxi 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: The pump, fan, spark generator and gas valve are switched off. The boiler can only be reset by manually using the thermostat knob.
Typical repair cost £120-250 (including labour)

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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Baxi models that show the Ignition Lockout fault code

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

Source

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

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026