System Airflow Description - Dual Automatic Temperature Control: Defrost

When DEFROST is selected:

• The RECIRC button is disabled. The recirculation door vacuum control motor is at no vacuum, admitting only outside air into the passenger compartment.
• The floor door, defrost door and panel 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 the floor duct 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.