2001 Pontiac Aztek Owner's Manual - Page 205
2001 Pontiac Aztek Manual
Page 205 highlights
Defogging and Defrosting To rapidly defrost the windshield, turn the temperature knob all the way clockwise (to the red area) and turn the mode knob to DEFROST. Adjust the fan to the highest speed. To keep the windshield clear and bring in heated air through the heater ducts, turn the mode knob to DEFOG. When the temperature outside is above freezing, the air conditioner compressor will run in these settings to help remove moisture from the air. Your vehicle is equipped with side window defogger vents located on the top of the instrument panel. For additional side window defogging, turn the mode knob to the BI-LEVEL setting and adjust the fan to the highest speed. Aim the side vents on the instrument panel toward the side windows. For increased airflow to the side vents, close the center vents. Operating the HVAC system in the RECIRCULATION mode may cause fogging of the vehicle's windows when the weather is cold and damp. To clear the fog, switch the HVAC system to either the DEFOG or DEFROST mode and increase the fan speed. To avoid re-fogging of the windows, operate the HVAC system in the OUTSIDE AIR mode. For additional information, refer to "RECIRCULATION" earlier in this section. 3-5
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