System Airflow
| Item | Part Number | Description |
|---|---|---|
| 1 | - | Recirculated air inlet |
| 2 | - | Temperature blend door (part of 18D283) |
| 3 | - | Panel headliner airflow |
| 4 | - | Mode door (part of 18D283) |
| 5 | - | Floor airflow |
| 6 | 18476 | Heater core, auxiliary |
| 7 | - | Auxiliary A/C evaporator core (part of 18C424 assembly) |
| 8 | 19805 | Blower motor, auxiliary |
The auxiliary climate control system has the following features:
- The auxiliary blower motor recirculates the air inside the vehicle. Outside air is not available to the auxiliary climate control system.
- Air is cooled and dehumidified by the auxiliary evaporator core only if the main HVAC module is adjusted to a position that requires A/C compressor operation.
- The temperature blend door and the airflow mode door are controlled by electric actuator motors.
- Movement of the auxiliary temperature/mode control between COOL/ROOF and WARM/FLOOR causes a corresponding movement of the temperature blend door to mix air flowing through and around the auxiliary heater core and also causes a corresponding movement of the mode door to the ROOF and FLOOR positions.