Evaporator Core: Description and Operation

A/C Evaporator Core

NOTE: The evaporator core is not separately serviceable, it is serviced only with the evaporator core housing assembly.

The evaporator core is an aluminum plate/fin type and is located in the heater core and evaporator core housing. A mixture of liquid refrigerant and oil enters the bottom of the evaporator core through the evaporator core inlet tube and continues out of the evaporator core through the evaporator core outlet tube as a vapor. During A/C compressor operation, airflow from the blower motor is cooled and dehumidified as it flows through the evaporator core fins.