Hummer 2008 H2 Owner's Manual page 175

Manual Operation
The air delivery mode or fan speed can be manually
adjusted using these buttons:
DC
(Fan): Use the fan buttons to manually adjust the
fan speed. To increase or decrease the airflow,
D C
press the or button.
Pressing one of these buttons when the system is off
will turn the system on. Pressing one of these buttons
when in automatic control will place the fan under
manual control. The fan setting remains displayed,
AUTO is no longer displayed, and the AUTO button
indicator light turns off. The air delivery mode will
remain under automatic control.
H G
(Mode): Use the mode buttons to manually
change the direction of the airflow in the vehicle.
H
Repeatedly press the
mode appears on the display. Pressing one of these
buttons when the system is off will change air delivery
mode without turning the system on. Pressing one
of these buttons when in automatic control will place
the mode under manual control.
The air delivery mode setting remains displayed,
AUTO is no longer displayed, and the AUTO button
indicator light turns off.
G
or button until the desired
H
(Vent): This setting will deliver air to the instrument
panel outlets.
)
(Bi-Level): This mode directs half of the air to
the instrument panel outlets and the floor outlets.
The flow can be divided between vent and floor outlets
depending upon where the knob is placed between
the settings. A little air is directed towards the windshield
and side window outlets. Cooler air is directed to the
upper outlets and warmer air to the floor outlets.
6
(Floor): This mode directs most of the air to the floor
outlets, with some of the air directed to the windshield,
side window outlets, and second row floor outlets. In this
mode, the system automatically selects outside air.
-
(Defog): See "Defogging and Defrosting" later in
this section.
@
(Recirculation): Press this button to turn the
recirculation mode on. When the button is pressed,
an indicator light will come on.
This mode keeps outside air from entering the vehicle.
It can be used to reduce outside air and prevent
odors from entering the vehicle. Recirculation may also
help cool the air inside the vehicle more quickly once
the temperature inside the vehicle is less than the
outside temperature.
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