Pontiac 2005 Aztek Owner's Manual page 144

)
(Bi-Level): This mode directs half of the air to the
instrument panel outlets, then directs the remaining
air to the floor 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. Use this mode to send air to the rear of
the vehicle. Keep the area under the front seats free
of objects that could obstruct airflow to the rear of
the vehicle.
The right knob can also be used to select defog or
defrost mode. For more information, see "Defogging
and Defrosting" later in this section.
9
(Fan): Turn the left knob clockwise or
counterclockwise to increase or decrease the fan speed.
Turn the knob to OFF to turn off the fan. The fan
must be turned on for the air conditioning compressor
to operate.
:
(Outside Air): Press this button to turn the
outside air mode on or off. When this mode is on,
outside air will circulate throughout your vehicle, and an
indicator light in the button will come on to let you
know that it is activated. The outside air mode can be
used with all modes, except for the recirculation mode.
3-22
?
(Recirculation): This mode keeps outside air
from coming in the vehicle. It can be used to prevent
outside air and odors from entering your vehicle or help
heat or cool the air inside your vehicle more quickly.
Press this button to turn the recirculation mode on or off.
When the button is pressed, an indicator light will
come on. The air-conditioning compressor also comes
on. The recirculation mode can be used with vent
and bi-level modes, but it cannot be used with floor,
defog, defrost or outside air modes.
Temperature Control: Turn the center knob clockwise
or counterclockwise to increase or decrease the air
temperature inside your vehicle.
#
A/C (Air Conditioning): Press this button to turn
the air-conditioning system on or off. When A/C is
pressed, an indicator light in the button will come on to
let you know that air conditioning is activated.
You may notice a slight change in engine performance
when the air-conditioning compressor shuts off and
turns on again. This is normal. The system is designed
to make adjustments to help with fuel economy while
still maintaining the selected temperature.
On hot days, open the windows to let hot inside air
escape; then close them. This helps to reduce the time
it takes for your vehicle to cool down. It also helps
the system to operate more efficiently.