Paul Compton

Hi there I was gonna regas my air-conditioning system on my grand cherokee but read that there are 2 types of gas you can get and not to mix them. Can any one tell me what type of gas jeeps use? I was gonna use one of those home kits.

Many thanks for any help.

wingless

The appropriate way to do this is to follow the FSM and to follow all appropriate safety procedures.

Assuming that the system is empty...

Get a vacuum pump and an A/C manifold set, connect it properly, suck out all the air and all the moisture, seal it off and verify it can hold a vacuum w/o leaks, then add the appropriate amount of R134a.

dave1123

Some of the older systems used R12, but because of environmental reasons is not longer used except by licensed technicians for specific systems besides automotive. If you have such an older system, it must be retrofitted to use R134a as required by law. R134a doesn't cool as good as R12, so some people don't like the way these systems work after the refit. About the only place you can find R12 anymore is small cans at garage sales. They aren't supposed to sell it, but they do.

wingless

The OP has a Grand Cherokee. It was introduced in MY 1993 using R134a.

dave1123

Okay, wingless. I'm remembering my Chevy truck. Give an old man a break, will ya?

wingless

My old Chevy had factory air when I drove by a factory... (and hand cranked the windows open)

andrewmp6

If your ac system is low on freon it has a leak its a sealed system.Not sure what year your grand is but its probably 134a.But i would try a vacuum test with some dye to see if it will even hold a vacuum and the dye with the special yellow glasses and black light will show a leak.