High
46 on Alpha Intec2 25 28XE

Your boiler has detected that a safety device or connection is missing or has been triggered, causing it to stop operating as a precaution.

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

Optional external safety sensor intervention. No continuity on external sensor circuit. Check link is present in external connections 14 and 15 or if fitted external safety device has activated

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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