High
Burner lockout on Firebird Envirogreen

Your boiler has stopped running as a safety precaution because it couldn't successfully light or maintain a flame.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

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.

What the manual says

Manufacturer manual

The burner control box lockout safety feature operates automatically if a fault occurs in the burner operation. This could be caused by: an interruption in the fuel supply, an electrical supply fault, a fault with the burner or its safety control system, the failure of a burner component, worn or dirty oil nozzle, or incorrect flue installation.

From this model's manual
Verified against the Firebird Envirogreen installation & service manual.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

Engineer required

This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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