Hi All,
I bought a 93 cherokee sport a half year ago and the guy told me the ac does not work. I checked the repair records and saw a r134a conversion and charge by a professional in 2004. I tried charging it myself today. I located the low pressure port (bottom one on the back of the compressor with blue cap). First the system wouldn't except any gas, it just made the dial on the can of coolant shoot up and then the connector would hiss off when I removed it. Hmmmm, noticed that the compressor didn't turn on. Checked the forums and found out to jumper the low pressure switch. I was pleased to note that the compressor runs. However, when I connected the 134a coolant, expecting it to suck it up the gas, it once again did not seem to want to accept gas. Is there another valve that I need to open? Does anyone have any suggestions for how to trouble shoot this? I figure that I would just waste cans if I had a leak. That is why I think this behavior is kind of odd. I'm probably missing something easy here.
Thanks for your help.
Best, Breton