well my freon is low so i wanted to recharge the system, but i'm not sure if it's R12 or R134. there is no sticker indicating either, and the condenser, lines, valves, etc all look practically brand new.

SO my question is - how can i find out what's in it? any home test kits, or do i have to take it to a mechanic???

thanks in advance

 

As I understand it, the valves on the two systems are different,
so it wouldn't be possible to put 134a in R12. Whoever is recharging the system should be able to spot the difference.
If you're trying to do it yourself, you'll just have to use the process of elimination, I guess.

BTW, shops still have plenty of R12 in stock. Unless you're planning on keeping the car a long time, it usually doesn't make economic sense to convert the system to R134a.

Not too long ago I faced an A/C repair on my BMW with R12 when the condenser sprung a leak. Replacing the condenser and recharging with R12 was much cheaper than replacing the condenser and also converting the system to R134a.

A/C is a closed system, so when you need a recharge, it usually indicates a leak someplace. Sometimes the leak is microscopic and a recharge will hold you for a whole season, but be prepared to replace a hose or something else.

 

If your car is a 93 it is r-12 if it's a 94 or 95 it should be R-134. The service ports are different between the 2 systems. The r-12 port looks like a tire valve it has threads on it. The 134 valve has a flared look to it with no external threads. If you have an r-12 car, convert it to 134. It's an easy job and will save you money in the long run, R-12 $27-35 a pound. R-134 $8-12 a pound

 

I agree with turbovr6. By converting to r134, you can recharge the system yourself without having to go to a mechanic or service center. You're also able to go to Wal-mart and buy r134 by the case.