Heating and Ventilation: Notes

The heating and defrosting system has the following features:

• Controls the temperature and, during A/C operation (if equipped), 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 blower motor speed.
• Cooling or heating can be adjusted to maintain the desired temperature.
• System uses a reheat method to provide conditioned air to the passenger compartment.
• The blower motor draws outside air through the air inlet duct just below the windshield during all system operations except for OFF, MAX A/C (manual systems), or RECIRC (EATC systems), when recirculated air is used.
• All airflow from the blower motor passes through the A/C evaporator core, if equipped.
• 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 door, which regulates the amount of air that flows through and around the heater core, where it is then mixed and distributed.