If you cannot use the touchscreen of your thermostat, please check the following cases: - If the timed mode is activated, the touchscreen is deactivated until the end of this mode. If necessary, stop this mode by clicking on the corresponding icon again - In other cases, the touchscreen may be deactivated, you can reactivate it from the Home + Control application: go to settings, select "Manage my home", select the room where the thermostat is installed, select the thermostat and select "Advanced", you can then activate or deactivate the "Touch" function.