2007 Hummer H3 Owner's Manual - Page 173

0 (Defrost): Turn the right knob on the control panel to this mode to direct most of the air to the windshield, and the side window outlets. When you select this mode, the system runs the air conditioning system unless the outside temperature is near or below freezing. Recirculation is not available in this mode. Do not drive the vehicle until all the windows are clear. Rear Window Defogger The rear window defogger uses a warming grid to remove fog or frost from the rear window when the key is in the ignition and turned to ON. Outlet Adjustment Use the air outlets located in the center and on the side of your instrument panel to direct the airflow. Your vehicle has air outlets that allow you to adjust the direction and amount of airflow inside the vehicle. Move the louvers up or down to change the direction of the airflow. Use the thumbwheel under the outlets to change the direction of the airflow from left to right. Operation Tips • Enable recirculation mode for maximum air conditioning performance. = (Rear Defogger): Press the right knob on the control panel to turn the rear window defogger on or off. First press of this button will activate the rear window defogger for 15 minutes and each subsequent activation lasts seven and one-half minutes. Notice: Do not use anything sharp on the inside of the rear window. If you do, you could cut or damage the warming grid, and the repairs would not be covered by your warranty. Do not attach a temporary vehicle license, tape, a decal or anything similar to the defogger grid. • Clear away any ice, snow or leaves from the air inlets at the base of the windshield that may block the flow of air into your vehicle. • Use of non-GM approved hood deflectors may adversely affect the performance of the system. • Keep the path under the front seats clear of objects to help circulate the air inside of your vehicle more effectively. 173