A/C Pressure Port Decoding Unlocking the System's Vital Signs

The low side port, or the low-pressure service port, is important because it's the point where you connect to recharge the AC refrigerant. Its location varies ... Typically, when the pressures are equal, and the compressor is engaged, then the compressor is bad. That said, those compressors don't usually fail internally ... High pressure you would turn the r134a can upside down to charge and right side up in the low side. I planned to go look pressure side, but then ... The low pressure side is the return line between the cabin evap and the gas compressor upfront near the drive belt. Certified A/C tech and body man here. The port behind your engine is the low pressure port. The high pressure port is under the black plastic ... The hard-to-access port down near the belt off a canister attached to the A/C compressor is the low pressure port. Learn the 4 main conditions that will cause your vehicle's A/C pressure to have low side pressure that is high and high side pressure that ... The low pressure port is where you charge. The high pressure port is readily accessible, and thankfully it's made "stupid-proof" so that you ... So I found out my AC was BADLY leaking out of the high pressure port and the O-ring for the low pressure switch was in bad shape when I pulled ... the low pressure port is the one near the dryer. the high pressure is the port near the compressor.