When I start the car and turn on the a/c it gets cold quickly and blows cold as long as I am parked. If I place the car in drive and proceed down the road, the air slowly warms back to ambient after a couple of minutes. If I stop the car, turn off the key and then start all over again the process repeats. It is pretty predictable in that I can get to a long traffic signal, turn off the ignition, and start it back up and enjoy a/c for the duration of the signal a a brief period after leaving the intersection.

I have tried other things to get it to reset but it seems nothing short of turning off the ignition will do it. Turning the a/c off and back on does not do it. Any other fiddling with the a/c controls is also ineffective.

I broke out my DTC "code reader" and got the following:
Pin 3 - 4
Pin 6 - 2, 4
Pin 7 - 1
Pin 8 - 1
Pin 14 - 5, 11

I cleared all codes and then tried to reproduce the problem in my driveway. I let the car sit in park for around 10 minutes and the compressor cycled as expected and the air was cold. I then placed the car in drive with the parking brake set and increased the rpm just slightly above idle. The car obviously did not move but the compressor stopped immediately (it has just started a few seconds bwfore) and did not start again for the next 5 minutes. I then place the car in park and turned off the ignition. After 10 seconds I restarted it and the compressor started again. I rechecked all the DTC pins and all are still clear.

The wiring harness was replaced over a year ago. And my belt used to slip but I just replaced it this weekend and no longer squeels. But the a/c problem has not gotten any better. Is my car possesed? Other that this is runs great.

Thanks in advance,
Dave