Set the thermostat to “Fan Only” or “Fan.”
Move the “Fresh Air/Exhaust” control to “Fresh Air” if the air conditioner has a fresh air/exhaust control. Set the thermostat to “Cool” if there is no fresh air/exhaust option.
Adjust the temperature to at least 78 degrees Fahrenheit for the best energy consumption.
Turn off the air conditioner when the outdoor temperature drops to freezing or below, which is 32 degrees Fahrenheit. Operating the air conditioner when the ambient temperature is below freezing can damage the unit.