Introduction: An essential component of air conditioning (A/C) systems, the A/C expansion valve, also known as a thermal expansion valve (TXV), plays a pivotal role in maintaining the cooling efficiency of vehicles and buildings. Understanding how it works, recognizing its failure symptoms, and estimating replacement costs can help vehicle owners and building managers address A/C issues promptly and effectively. How Does the A/C Expansion Valve Work? The A/C expansion valve serves as a bridge between the high-pressure, high-temperature liquid refrigerant coming from the condenser and the low-pressure, low-temperature gas within the evaporator. Its operation is governed by both temperature and pressure differentials. The valve contains a temperature-sensitive bulb connected to a capillary tube filled with refrigerant. As the surrounding temperature … Continue reading A/C Expansion Valve (How it Works, Failure Symptoms, and Replacement Cost)