The problem you’re experiencing may be related to calibration issues with the touch sensor inside the Smart AC Control.
To solve this, you’ll need to reset the calibration of the touch areas as follows:
Unplug your Smart AC Control, and
wait for one minute, then
plug the Smart AC Control back in. Make sure you don’t touch the screen while restarting the device to ensure success.
To avoid this issue in the future, please always place the Smart AC Control on a flat stable surface such as a table, shelf, or a wall before plugging it in. You can also use the tado° Stand to better position your Smart AC Control.
We recommend covering a larger portion of the touch sensitive area with your fingers rather than pressing the display harder. The blue shaded areas in the image below show the touch-sensitive areas on your Smart AC Control.