If your car was manufactured after 1994, chances are you're in the R134 camp. If your car uses the older R12 refrigerant, you should take it to a repair shop and have it converted to the newer stuff so you can be in the cool again.
If your AC system is R134 equipped, read on and we'll help you recharge your air conditioning so you'll be away from the "blowing warm" blues.
*If you have refilled your AC system before, and find yourself needing a recharge again today, you might want to check it for leaks. For a primer on the air coniditioning system itself, check out How Does My AC Work.