Hi Cartalk, you must be sick of me by now! I’ve tried googling this problem, but it seems most people start having problems when they turn the AC on, not off!
My car has a whistle that happens mostly when my foot is on the pedal, but also sometimes while driving at high speeds.
The AC has not worked since I bought the car a year ago; it blows but doesn’t get cold. The whistling stops immediately after turning on the AC and it doesn’t come back. We replaced the serpentine belt because it was cheap and easy, but it didn’t fix the problem as the whistling starts right up after turning off the AC.
My “defered maintenance” solution is just to leave the AC turned on, will this hurt anything other than mpg?