2006 Cadillac DTS Owner's Manual - Page 176

h (AUTO RECIRCULATION): If the AUTO position is selected on either the fan or mode control, the system will automatically control the air inlet to supply fresh outside air or recirculate the interior air to cool the car faster. The indicator light on the recirculation button will light whenever the system switches to recirculation. You may force outside air by pressing the button when the light is lit. The next time AUTO fan or mode is selected, the air inlet will reset back to AUTO operation. Manual Operation 9 (Off): Turn the left control to this position to turn the entire climate control system off. To change the current mode, select one of the following positions using the right control: AUTO: Turn the control to this position to turn on the automatic delivery mode operation. F (Vent): Turn the control to this mode to direct air to the instrument panel outlets. 9 (Fan): Turn the left knob either to the left or right to adjust the fan speed. Turning this control completely counterclockwise will turn on the automatic fan operation. Turning this control to the "O" position will turn the climate control system off. If the airflow seems low when the fan speed is at the highest setting, the passenger compartment air filter may need to be replaced. See Passenger Compartment Air Filter on page 3-53. * (Bi-Level): Turn the control to this mode to direct approximately half of the air to the instrument panel outlets and most of the remaining air to the floor outlets. In automatic operation, cooler air is directed to the upper outlets and warmer air to the floor outlets. Turn the control to this mode to direct most of the air to the floor outlets with some air directed to the side window outlets and the windshield. The mode control can also be used to select the floor/defog mode. Information on defogging and defrosting can be found later in this section. 7 (Floor): 3-46