High
Burner Lock-out on Grant Euroflame

Your boiler has detected a problem and safely turned itself off to prevent damage or danger.

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.

Technical description

Built-in safety circuit switches the burner off and the Lock-out reset button will light. Occurs due to burner malfunction, a fault, or low fuel supply.

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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