Ignition Lockout High

Baxi Ignition Lockout Fault Code

Also written as IGNITIONLOCKOUT — same fault.

The Baxi Ignition Lockout fault code means: your boiler has tried to light itself five times without success and has shut down for safety because a flame wasn't detected.. It appears on 3 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: When 5 ignition attempts have been made without a flame being detected then Ignition Lockout occurs. The pump, fan, spark generator and gas valve are switched off. The lockout light flashes once a second.
Typical repair cost £100-250 (including labour)

DIY fix possible

Check that your gas supply is turned on at the meterIf you have a prepay meter, check that you have sufficient creditPress the Reset button/dial on the front of the boiler

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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 31 August 2026