High
Ignition Lock-out neon on Halstead Best 80

Your boiler has stopped working because it failed to light the flame properly, so it has shut itself down for safety.

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

Boiler has failed to ignite. Turn thermostat to maximum and ensure programmer is switched on before pressing reset button.

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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