Evaporator Core: Description and Operation

Evaporator core
The evaporator core is an air cooler and a dehumidifier. As refrigerant enters, it boils, absorbing heat from air being blown through core by heater blower motor. This cools air, which is then directed to passengers through air ducts. As air is cooled, moisture in air condenses on core and is drained off. Result is cold, dry air. Evaporator core is a serviceable, replaceable item.