System Airflow Description - Dual Automatic Temperature Control: Floor

When FLOOR is selected:

• The RECIRC button is enabled. If the RECIRC button is pressed (indicator on) the recirculation door vacuum control motor is at full vacuum, closing off outside air to the passenger compartment. A RECIRC door time-out strategy will be used to prevent fogging and the RECIRC function will automatically be turned off after approximately four minutes. If the RECIRC button is not selected (indicator off) the recirculation door vacuum control motor will be at no vacuum, admitting only outside air into the passenger compartment.
• The defrost door and floor door vacuum control motors are at full vacuum and the panel door vacuum control motor is at no vacuum, directing airflow to the floor duct. A small amount of airflow from the instrument panel A/C registers, defroster duct and side window demisters 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. Only when A/C compressor operation has been selected by pressing the A/C request switch (indicator on) can the airflow temperature be cooled below that of the ambient (outside) air temperature.
• The A/C request switch is enabled. When the A/C request switch is pressed (indicator on) the A/C compressor will operate if the outside air temperature is above approximately 4°C (39.5°F).
• The blower motor is on.