Cadillac CT4 2023 Owner's Manual page 228

The following climate control
settings use more fuel:
MAX air conditioning mode
Defrost mode
Extreme temperature
settings, such as 15° C
(60° F) or 32° C (90° F)
High fan speed settings
To help reduce fuel usage:
Use the full automatic
control as described under
Automatic Operation.
Select a temperature setting
that is higher in hot weather
and lower in cold weather.
Turn off the air conditioning
when it is not needed.
Only use defrost to clear the
windows.
Automatic Operation
The system automatically
controls the following four
functions to heat or cool the
vehicle to the desired
temperature:
Fan Speed
Air Delivery Mode
Air Conditioning
Recirculation
When the AUTO indicator light
is lit, all four functions are
operating automatically. Each
function can be manually set
and the selected setting will
be shown. This cancels full
automatic operation and the
AUTO indicator light turns off.
Functions that are not
manually set will continue to
be automatically controlled,
although the AUTO indicator
light will not be lit.
To place the system in
automatic mode:
1. Press AUTO.
2. Set the driver and
passenger temperature.
To find your comfort
setting, start with 22 °C
(72 °F) and allow the
system time to stabilize.
Then adjust the
temperature as needed for
best comfort.
Climate Controls
To improve fuel efficiency and
to cool the vehicle faster,
recirculation may be
automatically selected in warm
weather.
The recirculation light will not
come on when automatically
@
controlled. Press
manually select recirculation;
press it again to select
outside air.
Do not cover the solar sensor
on the top of the instrument
panel near the windshield.
This sensor regulates air
temperature based on sun
load. See Sensors later in
this section.
Manual Operation
On/Off : Press to turn the
climate control system on or
off. When the system is off,
outside air will be prevented
from entering the vehicle.
When the system is on or a
button is pressed, the climate
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