Has anyone ever changed the low pressure cut off switch on a 98 xj. Any hints would be great like do you have to drain your system to put it on. Has anyone put one on and it not help. My ac has quit I checked freon and its running about 60 lbs and its 95 degrees out today. I can jump the low pressure switch and it works. The guy at o-rileys told me my condensor was pluged, how do I now. I washed cooling fins out ,even took the grill off so I could get to it, still nothing. HELP!!