10 Low

Daikin 10 Fault Code

The Daikin 10 fault code means: your heating system is struggling to judge the weather correctly because the outdoor temperature sensor has stopped sending a reliable signal.. It appears on 3 Daikin models in our database.

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.

Technical description: Outside sensor error
Typical repair cost £90-180 (including labour)

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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Daikin models that show the 10 fault code

Click a model for the full fault code list and model-specific repair notes.

Source

Daikin 10 fault code information on this page is sourced and cross-checked against the official Daikin service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026