lockout light High

Baxi lockout light Fault Code

Also written as LOCKOUTLIGHT — same fault.

The Baxi lockout light fault code means: your boiler has detected a safety issue and stopped working to protect your home, meaning you currently have no heating or hot water.. It appears on 4 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: Indicator light showing the appliance has entered a safety lockout state
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 lockout light fault code

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

Source

Baxi lockout light 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 27 April 2026