TheLoyale

part two:

I then connected a 134a container which weighed 17.40 oz with the fitting and after opening the can (which was upright) and the gauge high and low valves and the quick connect valves the system began to fill. The 134a container began to cool, I had about 40 psi I think the filling soon slowed, and after about 30 minutes I knew no more was transferring. I then closed the high side quick connect valve and the high side gauge valve. I have my assistant start the car and turn on the A/C. I expect the compressor clutch to then kick in and the compressor would then aid in the rest of the system fill. HOWEVER, the evil compressor will not engage, so I can fill the system any further.

My questions now:

Is there a pressure sensor or switch somewhere which is falsely preventing the compressor clutch from being engaged?