The low pressure side of the ac system is the ac hose that runs from the inside of the vehicle to the ac compressor. The high pressure side runs from the ac compressor to the condensor in front of the radiator. Follow the ac hose from the compressor back to the body and you will find the charge fitting. It is smaller in diameter than the high pressure side. You would need a different adapter to hook up to the high side.
read the manufacturers logo on the side of the unit and weigh the charge
Refrigerant is typically charged into the low-pressure side of the compressor to ensure the system operates correctly and efficiently. Charging refrigerant into the high-pressure side can lead to issues such as system damage, inefficient operation, or inadequate cooling.
A refrigerant compressor will be hot when running whether or not the charge is too high or too low. If the charge is too low, the compressor will cycle on and off. If too high the compressor may not run at all.
High side, If you charge liquid on the low side it can cause the valves of the compressor to break.
port is next to the compressor under the car...
Should be a pressure switch located on the top of the air drier/acculmulator -- jump this with a paper clip and clutch should pull in allowing you to charge system
You would charge it from the low side port.
Follow the larger hose from compressor this is low side
low side of a/c is the larger diameter line it the smaller fitting(charge side) vs. high side is your smaller line larger fitting
Follow the larger line from compressor maybe near the drier on the passenger side firewall
Is compressor running? If refrigerant charge is low it will not