I'm desperately trying not to have to take the jeep into the shop but here's what's going on and what we've already looked into...
The AC only works intermittently and does not work far more often than it does work. It appears that the message is not always getting to the AC clutch telling it when to engage. Air still blows when the AC clutch isn't engaging, it's just not cold.
AC Relay - Good
AC fuse - Good
Freon - full pressure
High and low pressure switches - both getting 12v and appear to be functional
A/C clutch feed - registered 8v
Does anyone have any other idea of what I could check or what might be the problem?
Do you love your Jeep? If so we invite you to join our community and see what it has to offer. Our site is specifically designed for you and it's a great place for Jeep Fans to meet online. Once you join you'll be able to post messages, upload pictures of your jeep, and have a great time with other Jeep Cherokee fans.. Whether your an old timer or just bought your Jeep you'll find that CherokeeForum.com is a great community to join. Best of all it's totally free!
I used the gauge that came with my Quest brand Synthetic AC Booster. We got the AC clutch to engage one time (out of dozens of tries), checked the pressure on the low-side, and added refrigerant until the pressure was about 50-55 PSI (Temps are ~100 outside today).
You're just checking the low pressure side and that doesn't tell the whole story. I'm a die hard do it myself person, but there are things that should be done by a qualified shop (or a do-it yourslef type with proper training) and AC is one of them. AC systems should be evacuated and refilled when problems like this occur after a proper diagnosis. Good luck.
1996 Jeep Cherokee SE 4X4 4.0 MT
Too much or too little pressure will make the clucth work irratically like on/off/on/off I m quite sure of this.I think Robertj has the right idea in this case to have a shop empty it than refill for you if there are no leaks etc you should be fine.
like the others have stated, a/c can be a pita. i am certified and what you showed for low side psi is correct but the high side can cut you off as well. just like the low pressure switch, there is a high pressure cut off switch. if your not sure, perhaps its best if some one else checks it over.
Well, Sometimes you'll have that.
It is the step by step that gets the correct answer.
Battery-15 amp #10 fuse on kick panel-Fan Relay-Clutch relay-Low Switch-High Switch-Temp switch on water outlet-Aux Fan.
Everything has to work together or the system will be twitchy.
It seems for many the High Side binary switch was the culprit-pressure/heat builds and the compressor clicks off. Mine started with the bad aux fan motor.
I popped my fuse when i was diagnosing the circuits. Did not find it til week week later! Ice cold now. Nothing like an XJ with A/C.