A/C - Sticking with R12 but looking for help

[DANTIP]

Originally Posted by WorkinLonghorn

Just a note. I have experience with commercial AC systems and some knowledge about Vehicle ACs and I wanted to point out that the correct way to leak-test a system is to use pressure, not vacuum. The shop I use to test systems uses 300 PSI of nitrogen.

If you use vacuum, you are using 14.7 PSI. and if there is a leak you are sucking air and moisture into the system which is always bad.

You can also use a Halogen leak detector ( around $30 on e-bay etc.) on a system pressurized with Freon. WL

x2! Nitrogen pressure test will help find small leaks that would lead to lost R12!! I like to spray a mixture of Prell shampoo and water on the connections. The mixture clings well and will bubble/foam nicely.

Good luck!