High
Lock-out reset button lit on Grant Vortex Combi 70

Your boiler has stopped working because it failed to ignite, causing a safety mechanism to shut the burner down.

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

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.

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