Hummer 2008 H2 - Manual (Page 174)

2. Set the driver’s and passenger’s temperature.
To find your comfort setting, start with a 74°F (23°C)
temperature setting and allow about 20 minutes
for the system to regulate. Use the driver’s or
passenger’s temperature buttons to adjust the
temperature setting as necessary. If you choose the
temperature setting of 60°F (15°C), the system
will remain at the maximum cooling setting. If you
choose the temperature setting of 90°F (32°C),
the system will remain at the maximum heat setting.
Choosing either maximum setting will not cause
the vehicle to heat or cool any faster.
Be careful not to cover the solar sensor located on
the top of the instrument panel near the windshield.
This sensor regulates air temperature based on sun load
and also turns on your headlamps. For more information
on the solar sensor, see “Sensors” later in this section.
To avoid blowing cold air in cold weather, the system
will delay turning on the fan until warm air is available.
The length of delay depends on the engine coolant
temperature. Pressing the fan switch will override this
delay and change the fan to a selected speed.
O (On/Off): Press this button to turn off the climate
control system. Outside air will still enter the vehicle,
and will be directed to the floor. This direction can
be changed by pressing the mode button. Recirculation
can be selected once you have selected vent or
bi-level mode. The temperature can also be adjusted
using either temperature button. If you adjust the
air delivery mode or temperature settings with the
system off, the display will illuminate briefly to show
you the settings and then return off. Press the on/off
button or the up down arrows on the fan switch,
the defrost button, AUTO button, or the air conditioning
button to turn the system on when it is off.
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