High
76 on Alpha E-Tec Plus

Your boiler is struggling to read its own internal temperatures because one of its sensors is sending conflicting or invalid signals.

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

Possible failure of one or both sensors

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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