A/C hasn’t been working on my 08 V6. Tried a recharge: nothing. Replaced the AC Cycling switch. Nothing. The Clutch seems to turn on, the pressure drops in the system and then the clutch turns off. Tried to jump the clutch and it will stay on with the jump but there will be no pressure in the system. Wondering, first off, if there is both a high pressure switch and a low pressure switch? Also could this indicate a bad compressor?