To reset Apple HomeKit on your thermostat please follow these steps: - Make sure the thermostat is powered. - Press and hold the button on the bottom right of the product until you hear a beep. - Then release the button and wait for the thermostat to restart. During this procedure, you will see a 5-second countdown on the screen. Access the Home + Control app to reconfigure the Wi-Fi settings that were reset. Go to Settings, select ;Manage My Home;, select the room where the thermostat is installed, select the thermostat and select ;Wi-Fi Setup;. Then follow the step-by-step instructions given by the app.