If the KE100 will not pair, these are the checks from Tapo’s KE100 guide.

What This Problem Means

The valve is not joining the Kasa hub.

Common Symptoms

• Not found in the Kasa app
• Pairing fails
• The valve light does not respond

Safe Checks You Can Try

1. Use the Kasa app and hub

Tapo says the KE100 needs the Kasa Hub KH100 and the Kasa app; the Tapo app is not supported.

2. Check the hub’s Wi-Fi

Tapo says the KH100 uses 2.4GHz only.

3. Check the range

Tapo says the valve talks to the hub over Sub-GHz radio, reaching about 45 metres through three walls. Move the hub closer if needed.

4. Check the batteries

Fit 2 fresh AA alkaline batteries (not rechargeable).

5. Reset it

Hold SYNC/RESET for 5 seconds or more, or remove it in the app, then pair again.

6. Check the limit

Tapo says up to 32 valves can join one hub.

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.