System Airflow Description - Manual Climate Control: Defrost

WARNING: This page is about a different car, the 2003 Ford Expedition. However, it is still accessible from the selected car via links, so may be relevant.

When DEFROST is selected:

The air inlet door vacuum control motor is at no vacuum, admitting only outside air into the passenger compartment.
The panel door and floor/defrost door vacuum control motors are at no vacuum, directing airflow to the defroster duct and side window demisters. A small amount of airflow from the instrument panel A/C registers and floor duct will be present.
Blended air temperature is available.
The A/C request button will not illuminate and is disabled. To reduce fogging, the A/C compressor will operate automatically if the outside temperature is above approximately 2°C (35°F).
The blower motor is on.
The auxiliary blower motor is enabled, if equipped.