The Air Conditioning system works well when sitting in the driveway with 40 degree air being blown out of the vents. When driving with the air temperature below 75 degrees it still blows at 40 degrees. However; if the temperature is above 80 degrees (give or take) the blowing air will be at 75/80 degrees or higher.
If I shut off the air conditioner for about 10 minutes or more it will again start blowing at 40 degrees for a little while and then blow "hot" air again.
Compressor appears to be kicking in appropriately, the blower motor is not a problem. There are no DTC or MIL codes showing. I have not specifically manually tested the ambient air temperature sensor or interior sensor yet; however, it seems unlikely since it does work for a while and always works when the outside ambient air temperature is less than 80 degrees or so.
Monday, May 28th, 2012 AT 5:54 AM