Expedition 2WD V8-5.4L (2009)
Expansion Block/Orifice Tube: Description and Operation
Thermostatic Expansion Valve (TXV)
Air Conditioning
Thermostatic Expansion Valve (TXV)
The TXV is located between the evaporator core lines and the TXV manifold and tube assembly at the RH rear of the engine compartment. The TXV
provides a restriction to the flow of refrigerant from the high-pressure side of the refrigerant system, and separates the low-pressure and high-pressure
sides of the refrigerant system. Refrigerant entering and exiting the 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 evaporator core and adjusts an internal pin-type valve to meter the
refrigerant flow into the evaporator core. The internal pin-type valve decreases the amount of refrigerant entering the evaporator core at lower
temperatures and increases the amount of refrigerant entering the evaporator core at higher temperatures.