When I am driving and have the A/C on, it blows frosty cold... for a while. Then the compressor disengages. It will not reengage, even though the pressure gets up to over 80 psi on the low side. If the vehicle sits for a while after shutting it off, without doing anything other than shutting the car off and restarting it later, the compressor runs fine until it disengages again. Without a doubt, anyone who has looked at the wiring schematic for this knows how frustrating it is to even look at. Does anyone have some suggestions?