What is a common result of an improperly functioning expansion valve?

An improperly functioning expansion valve can lead to inefficient cooling within a refrigeration or air conditioning system. The expansion valve plays a crucial role in controlling the flow of refrigerant into the evaporator. If the valve is not operating correctly, it may allow too much or too little refrigerant to enter the evaporator.

When too much refrigerant flows in, it can overwhelm the evaporator, leading to excessive liquid refrigerant returning to the compressor, which can cause flooding and reduced efficiency. Conversely, if too little refrigerant enters the evaporator, it won't absorb sufficient heat from the space being cooled, leading to inadequate cooling performance.

Thus, an incorrect function of the expansion valve directly impacts the system's ability to cool effectively, resulting in a loss of efficiency and comfort.