|
The A/C is used in warmer temperatures to dry out the air before it gets blown on the inside of your wind screen so it will be able to dry off the fog the has formed on it. I was always under the impression that the car knows the outside temp and below 35°F or so it would disable the A/C so only warm air would blow. Air at < 40°F does not have much moisture to begin with, so simply heating it will make a low humidity wind to clear condensation off your window. It's that 30-45°F temperature and high relative humidity that it all kinda goes haywire for me, too cold to need A/C but until the engine warms, it's all you got.
So in short, the A/C aids the deFOG function of your "defroster" at 40-70°F, isn't worth a darn to actually defrost....as your intuition probably told you. I've been contemplating pulling my A/C fuse in the cooler temps since I think they're too conservative in where they have the temperature cut off for that.
|