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