Now mind you, I am not claiming to be an expert on automobiles, but,here goes:
This guy at work(who I don't think all the lights are on upstairs, but there you are) said to me today that when he was driving , he had his window open and the heat was unbearable.
me: well, why don't you roll up your windows and turn on the ac?
Foster: no, because it runs off of gas.
me: oh....ok
I got to thinking, and this made more sense...that Ac runs off the coolant in a special compartment in the radiator which is then pushed thru the vents thru a fan. As I said I am not an expert...