How much does it cost to fix Firebird error code Burner Lockout F?

Typical repair cost for the Firebird Burner Lockout F fault is £120-350 including labour.

Burner Lockout F High

Firebird Burner Lockout F Fault Code

Q: What does the Firebird Burner Lockout F fault code mean?

Your boiler has shut down because it has detected an issue with how the exhaust gases are being cleared through the flue system.

Also written as BURNERLOCKOUTF — same fault.

The Firebird Burner Lockout F fault code means: your boiler has shut down because it has detected an issue with how the exhaust gases are being cleared through the flue system.. It appears on 2 Firebird models in our database.

Technical description: Incorrect flue installation.

Typical repair cost £120-350 (including labour)

Engineer required

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

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Firebird models that show the Burner Lockout F fault code

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

Source

Firebird Burner Lockout F 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