It is possible to convert an R12 System to 134a, however some (not all) systems need some retrofitting. It would be best to consult your local manufacturer dealer about which parts may need to be changed. Some auto parts stores may also know. Keep in mind that the info is usually free, you're under no obligation to buy from any particular store.
R-134A
yes freon is lost, and take into account that along with the gas in a/c, there is a/c oil as well this oil is needed to transport the gas thru the system. so if you dumped the gas and refilled with out the oil, the a/c still is not going to work
Unfortunately, if the air conditioning system is factory original and has not been converted to use the new R-134a refrigerant, you cannot refill the system yourself. R-12 refrigerant is the old stuff, it must be charged by a professional and will be very expensive. They quit making it almost 15 years ago. Depending on your location is could cost upwards of $300 to get it recharged, and if the system is low then you probably have a leak somewhere so that might be $300 out the proverbial window. If you plan on keeping the van, I would suggest that you convert the system to R-134a. A local air conditioning shop can do this for you. I will cost more than just a refill of R-12, but in the long run, it will be much cheaper as the refrigerant is MUCH less expensive should a leak develop.
before 1996 vehicles used R-12 which is now illegal to buy except for use in automobile shops. You must now take a test on R-12 and R-134a to be able to handle R-12. DO NOT ASSUME you can use R-134a with R-12 as this will ruin the A/C system on a R-12 system i am a certified ford automotive tech. i would just like wanting to know where i could find the low side adapter to charge the system. i am ac cetified good guy
its a gas that goes into it not a liquid. You will need to retrofit your car for the new gas as R-12 has been outlawed. The new gas is called R-134A
R 134a by Federal Regulations all cars have R-134a "freon" in the AC system since 1996 to present.
Is r-22 Freon compatible with r-134a freon?
you need to put the freon in the low side, should be the smallest cap on the ac system
yes
134a
That is a reference to automotive freon type 134a
No.
R-134a
Not unless you like the idea of destroying your AC system.
134A 134A 134A
R-134a a completely empty system will hold 28oz
You have to vacumm out the system then add a specific amount of R-134A with a refrigerant gauge