Evaporator Core: Description and Operation

EVAPORATOR CORE

NOTE:
- Installation of a new receiver/drier is not required when repairing the air conditioning system, except when there is physical evidence of contamination from a failed A/C compressor or damage to the receiver/drier.
- A second (auxiliary) evaporator core is used for HVTB cooling on hybrid vehicles. For information concerning the auxiliary evaporator core, refer to Heating and Air Conditioning.

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.