Low
CE on Alpha Intec 50CS

Your boiler is receiving an unusual reading from an external weather-sensing device linked to your heating system, signaling that the correction value is set incorrectly.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Monitor it

This is a minor fault. Keep an eye on it and mention it at your next annual boiler service. Reset the boiler and see if it clears.

What the manual says

Manufacturer manual

External control connection only used with system supervisor connection (displayed when external sensor correction exceeds +9)

From this model's manual
Verified against the Alpha Intec 50cs installation & service manual.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

Engineer required

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

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