Hummer 2007 H3 - 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.
=
(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.
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.
• 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.
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