REAR A/C UNIT CONSTRUCTION/OPERATION

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• Consists of the following parts:

  ― Rear blower motor
  ― Rear evaporator
  ― Rear evaporator temperature sensor
  ― Rear heater core
  ― Rear air mix actuator
  ― Rear airflow mode actuator
  ― Rear expansion valve
  ― Rear power MOS FET
  ― Air mix door
  ― Airflow mode door

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Air Mix Door Operation

• The air mix door moves to HOT or COLD position, using the air mix actuator. As a result, airflow distribution changes, and airflow temperature is controlled.

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Airflow Mode Door Operation

• The airflow mode doors, installed in the rear A/C unit control VENT, BI-LEVEL, or HEAT position, using the airflow mode actuator. As a result, airflow mode changes.

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Airflow distribution

Airflow mode | Distribution (%)
--- | ---
Rear vent | Rear heat
VENT | 100 | 0
BI-LEVEL | 50 | 50
HEAT | 0 | 100