2008 Chevrolet HHR Owner's Manual - Page 157

Defogging and Defrosting Fog on the inside of windows is a result of high humidity (moisture) condensing on the cool window glass. This can be minimized if the climate control system is used properly. There are two modes to clear fog or frost from your windshield and side windows. Use the defog mode to clear the windows of fog or moisture and warm the passengers. Use the defrost mode to remove fog or frost from the windshield more quickly. For best results, clear all snow and ice from the windshield before defrosting. Turn the right knob to select the defog or defrost mode. Rear Window Defogger The rear window defogger uses a warming grid to remove fog from the rear window. The rear window defogger will only work when the ignition is in ON/RUN. < (Rear): Press the button to turn the rear window defogger on or off. Be sure to clear as much snow from the rear window as possible. An indicator light below the symbol comes on to show that the rear window defogger is activated. The rear window defogger turns off approximately 15 minutes after the button is pressed. If turned on again, the defogger only runs for approximately seven minutes before turning off. If turned on again, the defogger will only run for approximately seven minutes before turning off. If the vehicle speed is greater than 50 mph (80 km/h) and the rear defogger is active, it remains on as long as the speed is greater than 50 mph (80 km/h). The defogger can also be turned off by pressing the button again or by turning off the engine. - (Defog): This mode directs approximately half of the air to the windshield and the side window outlets and half to the floor outlets. When this mode is selected the system runs the air conditioning compressor. To defog the windows faster, turn the temperature control knob clockwise to the warmest setting. Recirculation mode is not available in defog mode. 0 (Defrost): This mode directs most of the air to the windshield, with some air directed to the side window outlets and the floor outlets. When this mode is selected the system runs the air conditioning compressor. To defrost the windows faster, turn the temperature control knob clockwise to the warmest setting. Recirculation mode is not available in defog mode. 3-25