Heating and Defrosting: Notes
WARNING: This page is about a different car, the 2004 Ford RV Cutaway, 2004 Ford Econoline, 2004 Ford E450 Super Duty, and 2004 Ford Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
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 (if equipped with A/C) 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 (if equipped with A/C) to provide conditioned air to the passenger compartment.
- The blower motor (19805) draws outside air through the air inlet duct from just below the windshield during all system operations except for OFF and MAX A/C, if equipped (when recirculated air is used).
- All airflow from the blower motor passes through the A/C evaporator core (19860), 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 (18476), where it is then mixed and distributed.