Car stall with AC turned on-AC compressor may be locked

One of the main causes of a car stall with A / C on is compressor burn-in. If you hear squeaking, smoking, stalling, and warm air blowing out of the vents each time AC is turned on, the compressor is probably locked. If there is only a belt bark, the car does not stall, and the AC cools, then the belt or tensioner may be worn. The most likely cause of a car not idling high enough and stalling without other problems when A / C is on is an IAC (Idle Air Control) motor. It may be.

* When checking, keep in mind that the compressor can get hot to the touch.

How to check for locked up or seized compressors

1. Try turning the clutch plate (at the end of the cpo mpressor).
2. Use the nut socket that secures the clutch plate to see if the clutch plate can be turned.
3. Look for signs of overheating of the clutch plate. discoloration.

If the belt is loose, it may be due to wear on the serpentine belt tensioner, but this alone will not stall the car. If the IAC motor sticks, the car may stall. IAC motors usually accumulate carbon and can cause sticking. If the idle does not rise when AC is on, the engine may stop. In many cases, if this is a problem, you can remove the IAC motor from the throttle body, clean it with a brush and fuel injector spray, and then reinstall it.