I have an AC problem in that the AC works fine around town, but on long drives after about and hour and a half, it starts blowing warm air and even if I turn the fan to high, only seems to be blowing at about half it's normal speed. Next day it works normal again around town on short drives, but the next long drive out of town, it does the same thing like something is getting over heated or hot?

 

That sounds like it is icing up the evaporator. The next time it happens, leave the fan on full and turn off the AC. If it recovers to cold again in 5 to 10 minutes when the AC is turned on again then that is your problem. During the 5 to 10 minute off time with the fan running, the ice melted which enabled the evaporator to run normally to exchange cold air again.

 

Thanks, appreciate the input

 

If that works, don't forget to investigate WHY the evaporator is icing up. (Which, I would think, would not happen readily in arid Arizona.)

 

yes, I was not going to cover that until we determined if he had an icing problem or not.