Burner Lockout B High

Firebird Burner Lockout B Fault Code

Also written as BURNERLOCKOUTB — same fault.

The Firebird Burner Lockout B fault code means: your boiler has stopped working because it has detected an issue with its electricity supply or internal wiring.. It appears on 2 Firebird 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: An electrical supply fault.
Typical repair cost £90-250 (including labour)

DIY fix possible

Check if other electrical appliances in your home are working to rule out a power cut.Ensure your boiler's power switch or fused spur is turned on.Press the manual reset button on the burner control box once to see if the system restarts.

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Firebird models that show the Burner Lockout B fault code

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

Source

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

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