Air Conditioning - Cadillac 2008 SRX Owner's Manual

Air Quality Sensor: Your vehicle may have an air
quality sensor to help limit the climate control system
from pulling in irritating or harmful exhaust fumes from
other vehicles. This sensor, when active, monitors the
air quality in front of your vehicle and switches to air
recirculation when poor quality air is detected outside
your vehicle. The air quality sensor does not activate
due to organic odors like skunk, and may not activate on
many chemical-related odors. If you wish to limit these
types of odors, manually select recirculation.
To activate the air quality sensor, if your vehicle has one,
select the Auto Air Inlet on your climate control display.
The word AUTO is shown in the center of the display
under the outline shape of a vehicle. While the air quality
sensor senses poor quality air, the recirculation graphic
appears above the AUTO symbol.
Under some conditions, the air quality sensor system
does not operate. In cold weather, the system might
not be active (even if AUTO is displayed) because of
concerns of fogging your windows, which may occur by
activating recirculation mode. Also, the air quality sensor
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system does not remain in recirculation mode for
extended periods of time that could cause stuffy or very
dry conditions in the vehicle. Following a poorly running
vehicle for an extended period of time may not keep
recirculation active indefinitely.
The air quality sensor system does not protect against
carbon monoxide (CO), which you cannot see or smell.
See Engine Exhaust on page 2-39.

Air Conditioning

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(Air Conditioning): Press this button to turn the
air conditioning on or off, and override the automatic
system. When selecting the AUTO fan or AUTO mode,
the air conditioning compressor comes on automatically,
as necessary.
The air conditioning system removes moisture from the
air, so water might drip underneath the vehicle while
idling or after turning off the engine. This is normal.