What is the function of a compressor's suction line?

The function of a compressor's suction line is to carry low-pressure refrigerant gas from the evaporator to the compressor. This line is designed to transport the refrigerant in its gaseous form, which has absorbed heat from the surrounding space, effectively lowering the temperature within that area. As the refrigerant gas enters the compressor through the suction line, it is compressed, increasing its pressure and temperature before being sent to the condensing unit. This process is essential for the refrigeration cycle as it enables the system to remove heat from the area being cooled.

Understanding the role of the suction line is crucial for diagnosing and maintaining refrigeration systems, as issues within this line can lead to insufficient cooling or system failure. The other functions described, such as circulating high-pressure refrigerant or releasing cold air, relate to different components of the refrigeration cycle, whereas monitoring system pressure involves separate tools and mechanisms outside the compressor's basic function.