There are many different ways to go about troubleshooting your car air conditioning system. The best approach is to determine if it is a mechanical failure or electrical failure. Then diagnose the the problem in that manner. For example: If the air conditioning compressor clutch is not engaging it could be caused by no freon, or low freon charge which would be a mechanical failure. Also it could be caused by an electrical problem and no power is getting to the compressor. In order to diagnose the problem follow these steps: Troubleshooting your Air Conditioning System Step by Step
