High
Burner Lock-out on Grant Vortex Blue / Vortex Outdoor

Your boiler's safety system has detected a problem with the burner and has shut the unit down to prevent damage or unsafe operation.

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

If there is a burner malfunction, a built-in safety circuit switches the burner off and the Lock-out reset button will light.

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.

Find a Gas Safe engineer
Search the official register →

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