Medium
ERR>CM on Alpha E-Tec 24

Your boiler has lost its electronic link to the remote temperature controller, meaning it can no longer receive instructions on when to turn the heating on or off.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

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This fault should be looked at by a Gas Safe engineer within the next week or two. It may get worse if left.

Technical description

Connection error between the boiler and the Climatic control panel (Climatic control is powered but connection is lost).

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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