Cadillac 2010 DTS - Manual (Page 205)

0 (Defrost): This mode clears the windshield of fog
or frost more quickly. Air is directed to the windshield
and side window outlets. When selected, the system
automatically turns off recirculation and runs the
air conditioning compressor, unless the outside
temperature is at or below freezing. Recirculation cannot
be selected while in the defrost mode. Do not drive
the vehicle until all the windows are clear.
For professional vehicles, air will be allowed to flow
through the rear outlets. For quicker defrost, press the
AUX button on the front climate control system so
that the light is not lit.
# (Air Conditioning): Press to turn the air
conditioning system on or off and override the automatic
system. When in AUTO, the air conditioning compressor
comes on automatically, as necessary. To avoid
window fogging on rainy and humid days at
temperatures above freezing, run the air conditioning.
The air conditioning system removes moisture from
the air, so a small amount of water may drip under the
vehicle while idling or after turning off the engine.
This is normal.
: (Outside Air): Press to turn the outside air mode
on or off. An indicator light comes on to show it is
on. Air is pulled from outside the vehicle.
Pressing
? will cancel this mode.
? (Recirculation): Press to turn the recirculation
mode on or off. An indicator light below the button
comes on to show that this mode is on. This mode
recirculates and helps to quickly cool the air inside the
vehicle. It can be used to prevent outside air and
odors from entering the vehicle. This mode cannot be
selected while in the defog or defrost modes. If you try to
select the recirculation mode, the indicator light
flashes three times and turns off.
Operation in this mode during periods of high humidity
and cool outside temperatures may result in increased
window fogging. If window fogging is experienced, select
the defrost mode.
AUX: For vehicles with a rear climate control system,
press to turn the rear climate control fan on for automatic
operation. After the AUX button is pressed, the indicator
light comes on. Press the button again to turn the
auxiliary fan off. See Rear Climate Control System on
page 4-42.
PASS (Passenger Climate Control): Press to turn the
passenger climate control systems on or off. When
the passenger climate control system is on, the
passenger temperature setting is displayed. The
temperature selected by the front passenger also
controls the rear system air temperature unless the rear
seat passengers select their own comfort setting.
If the PASS button is pressed to turn the passenger
temperature setting off, the driver’s temperature
knob will control the temperature for the entire vehicle.
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