Jeep Other Air Conditioner Not Working

Hello, I Have A 2000 Jeep Grand Cherokee Limited And It Has Dual Temperature. I Live In Miami And It Boils Down Here. The Problem Is That...

The Ac Does Not Cool At All. The Pressure In The System Rises To ~45psi And Then Drops To ~15psi As The Compressor Turns On And Off. I Can...

96000 Miles With The 4.7l Engine...the Heater Is Blowing Only Warm Air Once In A While. Thermostat Appears To Be Okay In That The Engine...

The Oil Pressure Is Fine When The Jeep Is Cold. When The Engine Gets Up To The Operating Temp The Pressure Drops. When I Stop It Drops To...