The low side of an air conditioning compressor is the side where the refrigerant enters the compressor. The refrigerant enters the compressor as a low-pressure gas and is then compressed into a high-pressure gas.
The low side of the compressor is typically located at the bottom of the compressor. There will be a port on the compressor that is labeled "low side" or "LS."
High Side
The high side of an air conditioning compressor is the side where the refrigerant exits the compressor. The refrigerant exits the compressor as a high-pressure gas and is then sent to the condenser.
The high side of the compressor is typically located at the top of the compressor. There will be a port on the compressor that is labeled "high side" or "HS."
