Hi Mr. Scotty K!! I've got an ac issue .the low pressure is reading retard and the high side is…

Hi Mr. Scotty K!! I've got an ac issue .the low pressure is reading retard and the high side is around 190lbs.What are the reasons the compressor won't engage?It's on a Chrysler 300 and I'm afraid to directly jump the compressor.when I first installed this system the pressures read about 100 on each side.The unit ran perfect now it seems like it is restricted.Please help me out on this one.I ride on your videos religiously but this is one issue I can't find the answer to.

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