After 35 years of doing my own AC work, I now start with an electronic leak detector and just enough fill to get the compressor to switch on, let it get up to pressure, then turn the jeep off, and sniff everything from one end to the other, Evaporator, hose connections, (all connections), and the front of the compressor (front shaft seal), condensor, expansion valve, and so on, all for even the tiniest leaks.
I hate doing things twice, and I hate doing things 3 or 4 times even more!:banghead:Like pulling the vacuum again, adding $40 of refrigerant again, and so on.
For some reason my last 2 Jeep Renix AC overhauls, were the biggest nightmares of my life. Both took 4 tries before it ran trouble free for an entire summer. Only thing on them that is not new now is the OEM Evaporators!
Be sure to replace the filter / dryer!!!
If I were you I would get some refrigerant/dye and get it up and running some place that has gauges and an electronic sniffer. Pay them to make sure the pressures are not out of whack (look for a clog that pushed high side pressures high enough to crack the condenser perhaps?). And verify obvious dye leak locations and possible compressor shaft leaks on the front seal, that do not show up slow leaks from dye!!!!! My front shaft compressor seal leaks on 2 jeeps never showed up with dye, only with a sniffer. And one expansion valve leak was only detected and verified with the sniffer (dye test passed). Any hoses with signs of age in the cover or at the crimp connectors should be tossed.
The newer jeep evaporators are noted for problems too IIRC.