If the radiator stays cold (or too hot) with the KE100 fitted, these are TP-Link’s checks from its KE100 heating guide.

What This Problem Means

The valve is not opening or closing the radiator as it should.

Common Symptoms

• The radiator stays cold
• The radiator is always hot
• The motor does not run

Safe Checks You Can Try

1. Update the firmware

Update the KE100 and hub firmware in the Kasa app.

2. Test the motor

TP-Link says to set 30°C and check the light flashes and the motor runs.

3. Use the right batteries

TP-Link says to use AA LR6 1.5V alkaline batteries only (not rechargeable).

4. Check the fit

Check the valve fits, using an adapter if needed, and that the connector is tight and the adapter is fitted the right way (with the pushrod for RAV, GIA or M28).

5. Recalibrate

TP-Link says to set Sleep Mode to Fully Open, refit the valve, reset it for 5 seconds, add it again and run Device Settings > Calibration.

When To Contact Support

If none of these checks fix it, contact TP-Link support through TP-Link’s UK support site. Have your KE100 or KE110 and KH100 hub model numbers ready.