r 134
If you mix r12 with r134 air conditioning system, it will cause a high pressure in your airconditioning system and eventually damage the compressor and the evaporator. R12 is only for r12 aircon and something with r134, it can't be mix.
Why would you want to even consider doing this? R12 is no longer in production and as such it cost almost 4 times as much as R134. But to answer your question, use R12 in a R134 system and you will destroy the compressor as the oil is not compatible with R134 oil.
R12 unless it has been converted. I would convert it over to R134 due to the price of R12.
It came from the factory with R12. Unless it has already been converted which you will know by a sticker placed somewhere on the system, I would most definitely have it repaired and then converter over to R134. R12 is just too expensive to consider using.
R134a.
A 1999 Ford Mustang has r134a in the air conditioning system
Should be R134
It takes R134. R12 is no longer used in vehicles produced around 1990 and newer. Every vechicle from 95 and on uses R134A. Some cars may have even started converting over to r134 as early as 93 but officially EVERY VEHICLE from 95 and on has r134
To convert an R12 system to R134 all of the R12 will have to be removed. The system will have to be completely flushed out then special additives installed. This is done due to the way the different Freon's react to the systems gaskets. After this is done then the system is ready to be set up with new Freon.
Don't. R12 is so very expensive that you should have your vehicle converted over to use R134. You have a leak or you would be needing to add refrigerant. Have the leak repaired by a professional and have the system converted over to R134. The will remove all R12 & the oil from the system and replace it with R134 & the correct oil. They should pay you for the R12 due to how valuable it is. You may end up spending very little on this repair.
R12 134A pre 1996 is r12, after is r134
You do not want to buy Freon as it is very, very, expensive. Have the leak repaired, the system purged of all Freon R12 and the oil. Have it converted over to R134 refrigerant. You cannot just add R134 as the oil used in R12 is not compatible with R134. You will be money ahead by converting it.