I wanted to recharge/refill my A/C refrigerant and wanted to know if there is a difference in the nozzle connector for the low pressure valve between the R-12 and R-134a thus preventing a mix up of the different refrigerants or are the nozzles the same and the only way to recharge/refill is to have a shop do it or use a conversion kit?

What has me wondering is that the A/C compressor on the truck right now is not the OEM part, I could tell cause the sticker on the A/C compressor states is a Reman, this would lead me to believe that it might have been replaced for a A/C compressor that works with R-134a refrigerant.

 

Adding gas is a very dangerous job if you do it wrong, do not sound like you are up to school on this, in addition, ac parts are very expensive.

Just my 2 cents!!!

I would have a prof AC tech do the work, as it leaked down, it must have a leak in system that must be found and corrected or you will be adding gas next week.

Good luck and stay safe,
ride cool

 

R12 and R134 fitting are different. R12 fittings are just threaded nipple(kinda looks like a tire valve). R134 fittings have quick connect fittings with a valve in the center. It is important not to mix the 2 types so if you are not sure, take it in to get checked out

 

I believe that the sizes of the connections are different, but as was stated before: "It is important not to mix the 2 types so if you are not sure, take it in to get checked out"

If you find that you are still running R12, you can buy a conversion kit to R134 at most autoshops.

 

I went to Walmart and got a recharge can with a gauge, $30 if I remember.
It has very good instructions as to what pressure to look for.
The refill hose will only fit on the correct fitting, mine has two and one is larger than the other.
Mine has worked great since then.

Just don't overfill the system.