A/C Fill Question

[robroy55]

Hello once again Folks,
I have a 2002 24 valve and I need to top off the A/C with R-34. I can see two places to put R-34 in, one at the firewall and one up front on the pass side. Could someone tell me which one Front/Rear? I put the freon in?
Thanks for any help from the pros!! Also, can someone explain to me how to get into the arcives for this froum? so I don't have to bother your guys and look up the answers for my self.
Thanks again for all the help!!

Rob Roy

[way2old]

It will be the port on the line back by the firewall near the accumulator. There is a search function on the blue bar above the posts or on the reply screen.

[tripletdaddy]

AC systems don't do well over charged, so if you don't know which port to use, then I suspect you also don't know how much to put in it.

What condition or level of cooling do you have? In theory, if you have a COMPLETELY empty system, air and all, you can put the amount as specified on the underhood decal. That means you have to add up how much you put in, weighing the cans before and after you put them in, especially the last one as it most likely will be a partial. You should also consider adding some compatible ac oil if it is fully discharged, which can be found as blend canister or just straight ac oil. BTW its R-134a, and Freon is Dupont's registered trademark name for R-12, which we have all adopted for R-12 and now loosely use for other refrigerants, albeit incorrectly. I sure wouldn't want to incorrectly use that stuff at $50 per pound, needing two to three pounds for my car!?!

[Willyum]

I'm a do it yourselfer down to the last bolt but when it comes to properly charging your automotive A/C system, it should be done by a competent shop that uses an auto refrigerant machine. The machine evacuates what refrigerant is in the system, draws down a vacuum and fills the system with a clean and correct amount. An honest shop will only charge you for the refrigerant used. As tripletdaddy indicates, improperly charged systems don't work as well.

[robroy55]

Thanks for all the support Guy's and especially the tip on NOT to put to much in the system. I may be lucky but the guages I have have a color dyle that tells you when the proper amount of freon has been reached. Then you just turn off the valve on the can and your good to go.

Once again, Thank You for ALL the help with my questions and now I know how to check the arcives and not bother evryone with previously asked questions

Have a good Week !!
Rob Roy

[robroy55]

Originally Posted by robroy55

Thanks for all the support Guy's and especially the tip on NOT to put to much in the system. I may be lucky but the guages I have have a color dyle that tells you when the proper amount of freon has been reached. Then you just turn off the valve on the can and your good to go.

Once again, Thank You for ALL the help with my questions and now I know how to check the arcives and not bother evryone with previously asked questions

Have a good Week !!
Rob Roy

Just for the info, I checked the system and it was blowing out 70 deg's from the center vents. It should be at 65 deg's and when I put the guages on the system, the system read FULL, so I did not add any R-34.

Thanks again for all the help for this forum as always!!
Rob Roy

[tripletdaddy]

You're talking about just putting a gauge the same place you charged it. Right? It sounds like the ones you can get from Walmart by Interdynamics. Well, them things are actually deceptive, especially since you are only getting half the picture.

Does this car have a history of needing refrigerant? Chances are, with an air duct temp of 65 deg F at max cool, you don't have enough refrigerant in it. You only got enough in it to get the compressor to cycle some. Is it cylcing on and off say every 10 to 15 seconds? Needs more. But I'd day that just on temperature alone. You should be getting 40 to 50 deg F out of the center vent.

When you originally tried the ac, did it get cool any? Did the ac compressor clutch come on and then immediately shut back off? That would indicate very low refrigerant level. I expect your system to hold two to three pounds of refrigerant. I have a Taurus that every spring needs to be recharged. I used to be able to get by with a 12 oz can. It's gotten more hungry this year. So, I wouldn't be surprised if you needed at least one can. My ac would do just as I described above.