Heating and Ventilation

Heating And Ventilation

The heating and defrosting system is a blended air system and consists of a heater core, a blower motor, distribution doors and an evaporator core.

Air is directed through the heater core for heating and around for cooling, mixed and discharged through outlets in the plenum assembly to the floor, instrument panel registers or defrost nozzles as required

The heating and defrosting system:
- controls the vehicle air 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.
- controls the A/C blower motor speed.

The blower motor draws outside air through the air inlet filter and duct during all system operations except for MAX A/C cooling (when recirculated air is used).

Heating and Ventilation:

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. Air passing through the heater core is then directed to the relevant register.

Blower Motor
The HVAC blower motor pulls air from the air inlet and forces it into the evaporator housing and plenum assembly which is attached to the instrument panel where it is mixed and distributed.