Devices that have been added will not appear on the scanning list. You do not need to rescan the temperature sensor on the Govee Home app.
Here's what to do:
1. Please make sure you are in close Bluetooth range with your smartphone Bluetooth, Location/GPS on. Scroll down the “My device” list on the app.
2. Please disable your smartphone Bluetooth, then turn it on again. Scroll down the "My device" list.
3. If the problem still exists, please reboot your phone, then scroll down the “My device” list.
If more help is required, feel free to contact us via support@govee.com.