Air Conditioner Recharge???????
It'll never get as cold as the old R12. It's O.K. but not quite the same. Don't try to fill it yourself. A face full of R12 can blind you.
Answer:
and some are worse. there's a federal law against using anhydrous ammonia for home cooling, because of enough families choked in their sleep in the 20s when fridges leaked. you can use it in trailer fridges, because there is so little, and it vents to the outside in those systems, so they get nice and cold on one little gas pilot light providing the energy. once it conks out, however, nobody will repair them. for that matter, if you screw up and connect to the high side of a car system under operating pressure, the leakage stream can freeze and wreck your hand(s.) a turbine commercial cooling unit might not have the delta-pressure, but the amount of refrigerant that would get you negates the supposed advantage. that's one reason you should always review a potential repair before digging in... lots of hazards and places for, uh, detrimental outcomes whenever you deal with a system using lots of energy. don't figure on duct tape holding chassis springs in place, use logging chain... and don't figure that escaping refrigerant is only pollution. it's also lifetime SSI disability payments for the unprepared. I'm finishing rehab of an old but grand ham radio that has beryllium oxide blocks insulating 1500 volts from the outside case... two suddenly-deadly hazards for the price of one... and fortunately for the "Darwin factor," they are identified and easily prepared for. When R12 leaks out air moisture is forced in by atmospheric pressure. This moisture combines with the residual oil and turns into ACID which eats the aluminum from the inside. Vacuum the system down, repressurize, check and find leaks, repair the leaks, replace the receiver dryer and recharge. If you haven't waited too long internal dmage may be at minimum. Conversions to R134a are always less successful as the 4F warmer outlet temperature is the equivalent of a 20% less effective AC system.