2007 XJR AC compressor becomes inoperative after about 15 minutes. I checked system pressure and added 24oz of R134 to bring the pressure up to 50PSI from 48PSI (ambient temp at the time was 105). Radiator fan is running. After I let the car cool (overnight) the compressor will become functional. Note:engine temp (as indicated on the cluster gage) is mid range when the compressor disengages.

Subquestion: Will the compressor shut down if engine temp goes too high (even though indicated temp is normal)?

Thanks in advance for any suggestions on next steps.

Note: This is reposted on this forum after incorrectly posting on another forum.

Mark

 

Definitely it will stop working. I had a tired radiator fan and if I sat idling and before I saw the temp gauge rise the AC would stop working.

 

I too had a failing fan cause the AC to shut down before the engine would begin to overheat. A new (used) fan from a junkyard did the trick.