FRONT A/C UNIT CONSTRUCTION/OPERATION

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Construction

• Consists of the following parts:

  ― Front blower motor
  ― Air intake actuator
  ― Air intake door
  ― Front evaporator
  ― Front heater core
  ― Driver-side front air mix actuator
  ― Passenger-side front air mix actuator
  ― Front airflow mode actuator
  ― Front expansion valve
  ― Air filter
  ― Front power MOS FET
  ― Front evaporator temperature sensor
  ― Air mix door
  ― Airflow mode door

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Operation

Air intake door operation

  • The air intake door move to FRESH or RECIRCULATE position, depending on the position of the REC switch. As a result, air intake mode changes.

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Air mix door operation

  • The air mix door, installed in the A/C unit, controls HOT or COLD position, depending on the position of the temperature control dial. As a result, airflow distribution changes, and the airflow temperature is controlled.
  • When the DUAL switch is on, an operation signal is sent to each actuator to change the air mix door opening angle according to the operation of the driver and passenger temperature setting dials.

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Airflow mode door operation

  • The airflow mode doors move to VENT, BI-LEVEL, HEAT, HEAT/DEF, or DEFROSTER position, depending on the position of the airflow mode selector dial. As a result, airflow mode changes.

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AIRFLOW MODE | AIRFLOW RATE (%)
--- | ---
VENT | HEAT | DEFROSTER
DRIVER SIDE | PASSENGER SIDE | FRONT | REAR | DRIVER SIDE | PASSENGER SIDE
SIDE | CENTER | CENTER | SIDE | SIDE | CENTER | CENTER | SIDE
VENT | 25 | 25 | 25 | 25 | — | — | — | — | — | —
BI-LEVEL | 13.75 | 13.75 | 13.75 | 13.75 | 31.5 | 13.5 | — | — | — | —
HEAT | — | — | — | — | 56 | 24 | 3 | 7 | 7 | 3
HEAT/DEF | — | — | — | — | 31.5 | 13.5 | 8.25 | 19.25 | 19.25 | 8.25
DEFROSTER | — | — | — | — | — | — | 15 | 35 | 35 | 15