Cadillac 2011 DTS Owner's Manual page 192

selected on the fan control, the system adjusts the fan
speed.
To use automatic operation:
1. Turn the fan control to the AUTO position.
2. Turn the air delivery mode to the AUTO position.
3. Adjust the temperature to a comfortable setting
between 21°C (68°F) and 26°C (78°F).
Choosing the coldest or warmest temperature
setting will not cause the system to heat or cool
any faster. In cold weather, the system will start
at reduced fan speeds to avoid blowing cold air
into the vehicle until warmer air is available. The
system starts out blowing air at the floor but may
change modes automatically as the vehicle warms
up to maintain the chosen temperature setting. The
length of time needed to warm the interior depends
on the outside temperature and temperature of the
vehicle.
4. Wait 20 to 30 minutes for the system to stabilize in
order for the system to regulate automatically.
Then adjust the temperature as necessary to find
your comfort setting.
4-34
When this position is
Do not cover the solar sensor located in the center of
the instrument panel near the windshield. For more
information on the solar sensor, see Sensors later in
this section.
After the vehicle is started, the display shows the
interior temperature settings and the outside
temperature.
If the AUTO position is selected on the fan or mode
control, the system automatically controls the air
conditioning compressor. The A/C compressor will run
automatically even at cool outside temperatures in order
to dehumidify the air. The A/C indicator light is lit when
the system is operating automatically, even at near
freezing outside temperatures. Press
control to turn off the A/C. For improved window
clearing performance in defog or defrost modes, the
A/C compressor runs automatically.
selected on either the fan or air delivery mode control,
the system automatically controls the air inlet to supply
fresh outside air or recirculate the interior air to cool the
car faster. The light on the recirculation button will come
on when the system changes to recirculation. Outside
air can be forced by pressing
For vehicles without rear climate controls, press
force outside air. The next time AUTO fan or mode is
selected, the air inlet will reset back to AUTO operation.
on the fan
If the AUTO position is
when the light is lit.
to