Depending on which operating mode you have set it to, you have different options to ensure that your Smart AC Control is configured correctly in order to turn on your AC:
Verify that the tado° Smart AC Control is in direct line of sight of the AC unit. Also test that the devices are not too far apart and potentially decrease the gap. If the problem persists, reset the installation to repeat the recording of the commands.
If none of the commands is working for you, go to the room settings and push the command set to the device one more time or try to select a different one. In case your AC reacts to the ON command (i.e. it beeps) but it does not switch on, please contact our Technical Support.