How to tell if your air conditioner uses R-22
Take a look at the serial plate on the outside ac unit of your sytem. Most brands have a place for refrigerant or charge type somewhere on the plate. R-22, HCFC-22, or simply the number 22 all mean R-22 refrigerant is used in that model. Here are some examples that both use R-22. If you see R410a on the plate, this means that the newer refrigerant is used and your unit is unaffected by the phase out.