An air conditioning system is a nice convenience to have in a car, whether it is needed on a regular basis or not. Sitting in a hot car for even a few minutes can be life-threatening and miserable when the temperature outside is high. If your air conditioner isn't producing cold air properly, several parts of the system can be the cause of the problem. You can attempt troubleshooting the problem in your own, but in the end, you will likely need help from a professional.