High
Reset LED is lit on Halstead Buckingham 4

Your boiler has stopped working because it has detected an issue with the water temperature or the ignition process and needs to be reset.

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

Water system overheating or ignition failure.

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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