Auto Air Conditioning & Heater Repair: a/c blows warm air, vacuum leaks, altima

Question
My 2002 Altima blows warm air when driving, but it works fine at idle. I check the fans at idle and both worked, also i can see the compressor engaging fine. I haven't seen any obvious oil or vacuum leaks.Thanks for the help!

Answer
Hi Pete

Bring your rpm's up when you check your pressures and see if pressures are the same as at idle.
Also put your emergency break on and but your car in drive check your pressures then.  Altima's have a lot of problems with the ac thermostat.  But would not just do it at high speed.  It may only start while driving but would stay warm until you turn your engine off and restart.  Check and let me know.