Auxiliary Thermostatic Expansion Valve(TXV)

WARNING: This page is about a different car, the 2016 Ford Expedition. However, it is still accessible from the selected car via links, so may be relevant.

The auxiliary Thermostatic Expansion Valve(TXV) restricts the flow of refrigerant from the high-pressure side of the refrigerant system and separates the low-pressure and high-pressure sides of the auxiliary refrigerant system. Refrigerant entering and exiting the auxiliary evaporator core passes through the TXV through 2 separate flow paths. An internal temperature sensing bulb senses the temperature of the refrigerant flowing out of the auxiliary evaporator core and adjusts an internal pin-type valve to meter the refrigerant flow into the auxiliary evaporator core. The internal pin-type valve decreases the amount of refrigerant entering the auxiliary evaporator core at lower temperatures and increases the amount of refrigerant entering the auxiliary evaporator core at higher temperatures.