2008 Saab 9-7X Owner's Manual - Page 145

If recirculation mode is selected with floor, defog, or defrost modes, the indicator will flash three times and then turn off indicating the selection is not available. You may also notice that the air conditioning compressor will run while in recirculation mode. This is normal and will help to prevent fogging. If the weather is cold and damp, the system may cause the windows to fog while using recirculation mode. If the windows do start to fog, select defog or defrost mode and increase fan speed. Recirculation mode, if selected, will be cleared when the engine is turned off. To avoid fogging the inside glass on rainy and humid days at a temperature above freezing, press the air conditioning button to run the A/C compressor. Also it is best to avoid the use of the recirculation mode except when maximum air conditioning performance is needed or for short times to avoid exterior odors. You may notice a slight change in engine performance when the air-conditioning compressor shuts off and turns on again. This is normal. Defogging and Defrosting Fog on the inside of the windows is a result of moisture condensing on the cool window glass. This can be reduced if the climate control system is used properly. You can use either defog or front defrost to clear fog or frost from your windshield. #A/C (Air Conditioning): Press this button to manually turn the air conditioning system on or off. When the system is on, the system will automatically begin to cool and dehumidify the air inside of your vehicle. The air conditioning symbol will appear on the display when the air conditioning is on and will turn off when the air conditioning is off. If you turn the air conditioning off while in front defrost or defog mode, the air conditioning symbol will turn off, however, the A/C compressor will remain on to help de-humidify the air inside the vehicle. If one of the other modes is selected the compressor will then turn the A/C off until it is selected again or the AUTO button is pressed. - (Defog): Use this setting to clear the windows of fog or moisture. This setting will deliver air to the floor and windshield outlets. Press the front defrost button to clear the windshield and side windows of frost or fog quickly. The system will automatically control the fan speed if you select defrost from AUTO mode. If the outside temperature is 40°F (4°C) or warmer, your air conditioning compressor will automatically run to help dehumidify the air and dry the windshield. Do not drive the vehicle until all the windows are clear. 3-23 0 (Front Defrost):