1. Power: Turn the air conditioner on and off. This button will clear the TIMER setting. 2. MODE: Press the button to select the mode of operation, AUTO, COOL, DRY, FAN ONLY, HEAT. Note: The HEAT mode is only for some heating models. If you do not need it, press the MODE button for more than 5 seconds to delete the HEAT function, and the COOL mode will be selected automatically. Press the MODE again for more than 5 seconds to add the HEAT function, and the HEAT mode will be selected automatically. 3.