What happens if you turn on AC in winter?
What happens if you turn on AC in winter? In terms of the harm that can be caused to the air conditioner if you run it during wintertime, the compressor may overheat since the oil is usually too thick to circulate in cold temperatures. This may cause the unit to fail. How cold can a car AC get? A system only half full of refrigerant can still cool well in the 70 - 75f degree range but be almost useless at 85 - 90f degrees. So if you do the test at 75 degrees it doesn't mean it will work...