To delete the Wi-Fi credentials, simply touch the two arrows below the display for 5 seconds. This works even if the arrows are not lit.
Note: Please make sure to position your fingertips only on the arrows. If the display is touched, the procedure will fail.
When successful, the service menu will open up. This will be indicated by a wrench and screwdriver symbol.
Use the arrow buttons to cycle through the menu until you are at the menu item showing a Wi-Fi symbol and a trash can.
Touch the main area of the display to confirm the deletion of the Wi-Fi credentials. Blinking of the Wi-Fi symbol and trash can confirms the deletion.
After deleting your Wi-Fi credentials, you can enter new ones using the tado° app.