Understanding the common causes of expansion valve failure can help in preventative maintenance. Here are a few factors that can lead to
the malfunction of the AC expansion valve:

Wear and Tear

Over time, the expansion valve can wear out due to the constant pressure and temperature changes it undergoes. Regular use and the
natural aging process can degrade its components, leading to failure.

Contamination

Contaminants such as dirt, debris, or metal particles can enter the AC system and clog the expansion valve. This obstruction prevents
the valve from functioning correctly, disrupting the refrigerant flow.

Moisture

Moisture in the AC system can freeze and block the expansion valve, especially in colder climates. This blockage can cause the valve
to malfunction, affecting the overall performance of the air conditioning system.