Heating and Ventilation

HEATING AND VENTILATION

The heating and ventilation system includes the:
- blower motor.
- evaporator core housing.
- heater core housing.
- heater core.

The heating and ventilation system has the following features:
- System controls the temperature and reduces the relative humidity of the air inside the vehicle during A/C operation
- System delivers heated or cooled air to maintain the vehicle interior temperature and comfort level
- Cooling or heating can be adjusted to maintain the desired temperature
- System uses a reheat method to provide conditioned air to the passenger compartment
- All airflow from the blower motor passes through the A/C evaporator core
- The temperature is then regulated by reheating a portion of the air and blending it with the remaining cool air to the desired temperature
- The temperature blending is varied by the air temperature control doors, which regulate the amount of airflow through and around the heater core, where it is then mixed and distributed

Blower Motor
The blower motor pulls air from the air inlet, then forces it through the heater core housing and into the plenum assembly where it is mixed and distributed. The blower motor is mounted to the evaporator core housing on the engine side of the dash panel.

Evaporator Core Housing
The evaporator core housing is mounted on the engine side of the dash panel, and houses the blower motor and evaporator core. All airflow from the blower motor is directed through the evaporator core before moving to the heater core housing for temperature blending.

Heater Core Housing
The heater core housing is mounted to the instrument panel side of the dash panel, and houses the heater core and temperature blend doors. The heater core housing is partitioned to provide separate temperature blend doors for the driver and passenger sides of the vehicle. All airflow from the evaporator core housing passes through the heater core housing before entering the plenum chamber for distribution.

Heater Core
The heater core consists of fins and tubes arranged to extract heat from the engine coolant and transfer it to air passing through the heater core. The heater core is located in the heater core housing on the instrument panel side of the dash panel.