The ClimateMaster 33B0002N10 Thermal Expansion Valve (TXV) is a precision HVAC component designed to regulate refrigerant flow into an evaporator. Used in compatible heat pump and air-conditioning systems, it responds to evaporator temperature and pressure to maintain proper refrigerant superheat. By controlling refrigerant flow according to system demand, the TXV supports efficient h... https://www.partshnc.com/33b0002n10-climatemaster-txv