Concorde V6-3.2L VIN J (2000)
Expansion Valve: Description and Operation
The "H valve" type thermal expansion valve (TXV) is located at the point where the refrigerant lines join the evaporator coil on the engine compartment
side of the dash panel.
The expansion valve is a factory calibrated unit and cannot be adjusted or repaired. If faulty or damaged, the expansion valve must be replaced.
High-pressure, high temperature liquid refrigerant from the liquid line passes through the expansion valve orifice, converting it into a low-pressure, low-
temperature mixture of liquid and gas before it enters the evaporator Coil. A temperature sensor in the expansion valve control head monitors the
temperature of the refrigerant leaving the evaporator coil through the suction line, and adjusts the orifice size at the liquid line to let the proper amount of
refrigerant into the evaporator coil to meet the vehicle cooling requirements. Controlling the refrigerant flow through the evaporator ensures that none of
the refrigerant leaving the evaporator is still in a liquid state, which could damage the compressor.
