Wednesday, August 12th, 2020 AT 12:01 PM
Have a slight vacuum hiss under dash with car idling and heater turned to max cool or to max heat, no difference. Car gives heat only, A/C manifold gauge shows 34 outside hooked to lines, compressor running. My wife's car listed above sx model 3.0 5 sp man. Car only blows warm to hot air, A/C on/off maxes no diff blend control from max cool to max hot, have plenty of hot air. Only cure is to turn unit off from max cool to max hot, only get got air. There is a small whistle from under dash indicating a vacuum leak, could this be the problem and if so where wife is really not happy with me. Help?