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Discussion Starter #1
Ran across this today, thought it might help someone else.
Using a pressure gauge on both the low and high side, you may be able to determine the cause of the AC not working properly.
This is not an "be all - end all" tool to determine the root cause. But could steer you in the right direction to make your diagnosis efforts a little more meaningful.
Better than just taking a stab in the dark. :)

Guide to AC Compressor Pressure Readings
 
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