Press [Power]. Use the [Up and Down] arrow keys to set the desired temperature. Press the [Mode] key repeatedly until "Cool" mode is selected. If needed, press the [Fan] key on the remote or control panel to adjust fan speeds.

The Air Conditioner Does Not Generate Cold Air First, check the thermostat to ensure it's set to "cool" mode. If it is, the next step is to look at the air filter. A dirty filter can restrict airflow and prevent the unit from cooling properly. The problem may be with the air conditioner if the filter looks clean.

Inspect the end that connects to the air conditioner. It should be connected securely with no air escaping. Ensure that nothing is inside the vent, such as packing material or accessories for the air conditioner. Visually inspect the length of the duct for any holes or tears.