Express 1/2 Ton Van V6-4.3L VIN W (1999)
Evaporator Core: Description and Operation
The evaporator cools and dehumidifies the air before the air enters the vehicle. High pressure liquid refrigerant flows through the orifice tube (front
system) or TXV (rear system) into the low pressure area of the evaporator. The heat in the air passing through the evaporator core is lost to the cooler
surface of the core, thereby cooling the air. During this process, any moisture in the air condenses on the outside surface of the evaporator core. This
condensed moisture drains off as water.
