High
Lock-out lamp on Firebird Popular Heatpac

Your boiler has shut down to protect itself and needs to be manually restarted because the burner has failed to light.

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

Indicates burner lock-out; located on the reset button. Requires manual reset after 20 seconds.

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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