Evaporator Core: Description and Operation

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