High
Red LED flashing on Halstead Finest Gold

Your boiler has stopped working because it failed to ignite, which means it is currently unable to provide heating or hot water for safety reasons.

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

Safety Lockout. Burner has failed to light and gone to ignition lock-out.

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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