Heating and Ventilation

Heating and Ventilation

The heating and ventilation system has the following features:

- Controls the temperature and, during A/C operation, reduces the relative humidity of the air inside the vehicle
- 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


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 plenum chamber behind the instrument panel.


Blower Motor

The blower motor pulls air from the air inlet and forces it into the evaporator core housing and the plenum chamber where it is mixed and distributed.


Evaporator Core Housing

The evaporator core housing directs airflow from the blower motor through the evaporator core. All airflow from the blower motor passes through the evaporator core. The airflow is then directed to the plenum chamber.


Heater Control Valve

The heater control valve is actuated by the air inlet door vacuum control motor circuit. When the heater control valve is closed (full vacuum), coolant flow through the heater core is cut off and A/C cooling efficiency is increased.