Nissan Repair: No cold AC from Front Vents, computer module, cold ac

Question
I have 01 Quest van that at times gets warm air from the front vents but the back vents blow perfectly cold air. I notice if I use the car on a trip in the morning when it is cooler, it works fine. If  I turn the car off and the cab get warm the front vents start blowing warm air

Answer
Mark,

Sounds like the climate control is screwing up.  The computer is known to do strange things.  I would have the system pressures checked to make sure the pressures are correct.  If this is the case, then it is the computer module for the climate control that is defective.