Freon capacity

Did you pull a vacuum and add the required pag oil for the part that you replaced. I think you over filled it but with out further info can't say.

http://www.evanstempcon.com/tsg_RefrigerantChargeGuide.php

Since there are a lot of variables, just monitor the temp or the pressure and look for a change. As soon as the duct temp starts to rise, stop adding freon.

I did add 3oz of pag oil, then I did pull a vacuum for about an hour. It is blowing cold air, and I can see the sight glass, with a mirror, I can't tell if I'm still seeing bubble, or if it's the dye in the oil.

If you are looking for all of the bubbles to disappear in the sight glass, that does not happen with R-134a.

1. 134a NOT Freon:@
2. 134a will still bubble in the sight glass.
3. Unless you had a catastrophic loss of coolant, if you just had a slow leak, then you NEVER add Oil at all. The ONLY correct way to add oil is to pull the compressor, drain it and add the correct amount of oil per the compressor. Adding oil when not required will add too much oil to the system and degrade the cooling capacity.
4. The Charge for a Ford Class A chassis is dependent on the complete system. The range is 2.25 oz to 2.75 MAX oz. Doug

PS, you added 1 can too many---TOO MUCH 134a will not cool as the correct amount. There is a curve----Once the 134a reaches its correct amount, adding too much starts a lack of cooling and the output temp starts to raise.

Yes I used 134a, and it was leaking Freon, and oil at the bottom corner of the condenser.

ggoguen wrote:
Yes I used 134a, and it was leaking Freon, and oil at the bottom corner of the condenser.

Using 134 and leaking Freon? Sounds odd.

Like someone else said, too many variables
What's your outside temp?
You're in FL.
How long was the system open?
Did you replace the drier?
Too much oil
Too much 134a

185EZ wrote:
Like someone else said, too many variables
What's your outside temp?
You're in FL.
How long was the system open?
Did you replace the drier?
Too much oil
Too much 134a

Bingo, I did not catch the fact that he did not state he replaced the drier. You ALWAYS replace the Drier in this type repair. Doug

dougrainer wrote:
1. 134a NOT Freon:@o much starts a lack of cooling and the output temp starts to raise.

Doug... You beat me to it.. Thanks.