What line on the ac unit is low side and what high side?

The low side of an AC unit is the part of the refrigeration system where the pressure is lower. The low side is usually copper in color with a larger diameter. The high side of an AC unit is the part of the refrigeration system where the pressure is higher. The high side is usually copper in color with a smaller diameter.

Here are some additional tips for identifying the low and high side lines:

* The low side line is usually located near the evaporator coil, which is the part of the AC unit that absorbs heat from the air.

* The high side line is usually located near the compressor, which is the part of the AC unit that compresses the refrigerant gas.

* The low side line is usually cooler to the touch than the high side line.

* The high side line is usually louder than the low side line.