System Airflow Description - Dual Automatic Temperature Control: Floor/Defrost

WARNING: This page is about a different car, the 2005 Mercury Mountaineer and 2005 Ford Explorer. However, it is still accessible from the selected car via links, so may be relevant.

When FLOOR/DEFROST is selected:

The RECIRC button is disabled. The air inlet door vacuum control motor is at no vacuum, admitting only outside air into the passenger compartment.
The floor door vacuum control motor is at full vacuum and the defrost door and panel door vacuum control motors are at no vacuum, directing airflow to the floor duct, defroster duct and side window demisters. A small amount of airflow from the instrument panel A/C registers will be present.
The heater control valve is automatically controlled by the DATC module based on the temperature settings.
Temperature control can be adjusted by directing the airflow through and around the heater core.
The A/C request switch will be disabled and will not illuminate. The A/C compressor will operate automatically if the outside air temperature is above approximately 6°C (43°F).
The blower motor is on.