Low
10 on Daikin Altherma Hybrid EHYKOMB33

Your heating system is struggling to judge the weather correctly because the outdoor temperature sensor has stopped sending a reliable signal.

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

Outside sensor error

From this model's manual
Verified against the Daikin Altherma Hybrid Ehykomb33 installation & service manual, page 30.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

DIY fix possible

Check the outdoor sensor unit for any obvious physical damage or loose wiresClear away any debris, snow, or overgrown plants blocking the sensorTurn the system power off and back on at the fused spur to see if the error clears

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