2002 CADILLAC DEVILLE air condition

3-3
!~(Fan): This switch adjusts the fan speed. Press the
up arrow to increase fan speed and the down arrow to
decrease it.
(Recirculation): Press this button to limit the
amount of outside air entering your vehicle. This is
helpful when you are trying to cool the air quickly or
limit odors entering your vehicle. Press this button again
to turn off the recirculation feature. If you notice the
windows fogging, turn off the recirculation feature.
Recirculation is not available in the defrost mode.
FRONT (Defrost): Press this button to quickly
remove fog or frost from the windshield. This setting
sends most of the airflow to the windshield with only a
small amount to the floor outlets. The air conditioning
compressor will operate in this mode.
A/C (Air Conditioning): Press this button to turn the
air conditioning compressor on and off. The system will
cool and dehumidify the air inside the vehicle. A/C
cannot be turned off in defrost mode.PASS OFF (Passenger's Climate Control): Pressing
this button will turn off or on the climate controls for the
passengers. When this feature is active, the driver's
climate control settings are used for both the front and
rear seating areas.
Driver's Temperature Knob: The knob located on the
left side of the climate control panel is used to adjust the
air temperature coming through the system for the
driver's side of the vehicle while the passenger's side
controls are active. Turn the knob clockwise to increase
the temperature displayed on the climate control panel,
or turn the knob counterclockwise to decrease the
temperature. Press the knob to turn the climate control
system off.
~PASS TEMP! (Passenger's Temperature): This
switch is used to increase or decrease the temperature of
the air for the right front passenger independent of the
driver's setting.
Press the up arrow to increase the temperature setting or
the down arrow to decrease it.

3-4
Automatic Operation
AUTO: This button is used to select the automatic
operation of the climate control system. When the
automatic operation is active, AUTO will appear on
the display.
A sensor will control the air delivery mode. Air will
come from the floor, the instrument panel or windshield
outlets. The fan speed and use of air conditioning
will vary as the system maintains the selected
temperature setting.
Do not cover the electronic solar sensor located on top
of the instrument panel near the windshield. The sensor
is used by the automatic system to regulate temperature.
See ªElectronic Solar Sensorº later in this section for
more information.
To find your comfort zone, start with the 75
F (24
C)
setting and allow about 30 minutes for the system to
regulate. Turn the driver's temperature knob to adjust
the temperature if necessary. If you choose 60
F
(16
C), the system will remain at that maximum cooling
setting and will not regulate fan speed. If you choose
90
F (32
C), the system will remain at that maximum
heating setting and will not regulate fan speed. Choosing
either maximum setting will not cause the system to heat
or cool any faster.In cold weather, when the system senses the need for
heat, the airflow will be directed out of the floor outlets.
As the interior temperature approaches the desired
setting, the fan speed will decrease. To maintain interior
comfort, the airflow may move to the instrument panel
air outlets and floor outlets (bi
-level mode). On bright
sunny days in cold weather, the airflow may come out of
the instrument panel outlets in A/C mode to maintain
comfort and prevent stuffiness.
When the automatic setting is active, the air
conditioning compressor cycles when needed to cool the
air. If your vehicle is sitting out on a hot day and AUTO
is active, the air will first flow out of the floor outlets for
a few seconds. This is normal. This is to remove hot air
from the air outlets. As the air is cooled, the airflow will
move through the instrument panel outlets. If you start
your vehicle with the fan setting on HI, it will skip the
air conditioning purge and the system will be in
manual mode.

3-5
To avoid blowing cold air in cold weather, the system
will start at reduced fan speeds until warm air is
available. The length of reduction depends on the
outside air temperature, engine coolant temperature
or the time since the engine was last started. As the
coolant warms up, the fan speed will gradually increase
and air will flow from the floor outlets, with some
airflow to the windshield to prevent fogging under most
normal conditions.
If you select defrost mode or a fan speed, this function
will be skipped and the system will be in manual mode.
If you leave your vehicle, the system will recall the
control setting the next time you start your engine,
except for recirculation and defrost.Electronic Solar Sensor
The sensor monitors the sun's solar radiation. It is located
on top of the instrument panel near the windshield.
When the climate control system is in AUTO, the system
uses this information to automatically make the necessary
temperature and airflow adjustments to maintain your
comfort. The climate control system may supply cooler air
to one side of your vehicle, if that side is facing the sun.
Be sure not to cover the sensor on top of the instrument
panel. If you do, it will not work properly.

3-6 Air Conditioning
On hot days, open the windows long enough to let hot
inside air escape. This reduces the time it takes for your
vehicle to cool down. Then keep your windows closed
for the air conditioner to work its best.
Press the driver's temperature knob to turn the system
on manually. You may also need to adjust the
temperature and fan speed. The system will cool and
dehumidify the air inside the vehicle.
When the system is in AUTO, it will use recirculation as
necessary to cool the air.
Heating
Press MODE to select floor. Adjust the interior
temperature manually to a comfortable level. If the fan
speed needs adjustment, press the up or down arrow.
Outside air will be brought in, warmed and sent through
the floor, instrument panel outlets. The heater works
best if you keep your windows closed while using it.
In AUTO, the fan will not run at high speed to minimize
warm
-up time.
Defogging and Defrosting
Use FRONT on cool and humid days to keep the
windshield and side windows clear. This setting will
remove fog or ice from the windshield quickly in
extremely humid or cold conditions. If you desire to
have more air on your feet, turn the control to the
floor/defrost mode.
Press FRONT to activate the defrost mode. Adjust the
fan speed by pressing the up or down arrow on the fan
button. You may also adjust the temperature by turning
the driver's temperature knob. If you select floor/defrost
from AUTO, the system will control the fan speed and
temperature for you.
Recirculation is not available in the defrost mode, and
the A/C system cannot be turned off in this mode.

3-9
~ TEMP ! (Temperature): Press this switch to
manually adjust the temperature. Press the up arrow to
increase the temperature or the down arrow to decrease
it. The current temperature will appear on the display
above the climate control panel.
The front seat climate control panel has an AUTO
button that can override the climate controls of the rear
seating area automatically. When AUTO is pressed, the
rear automatic mode is selected and the rear air
temperature and mode will readjust to coincide with the
setting selected for the front seating area.
The PASS OFF button on the front climate control panel
allows the settings for the driver to be used for the front
and rear seat areas.Ventilation System
Your vehicle's flow-through ventilation system supplies
outside air into the vehicle when it is moving. Outside
air will also enter the vehicle when the heater or the air
conditioning fan is in operation. See ªRecirculationº
listed previously in this section for more information.
The front outlets are located in the center and at each
side of the instrument panel. You can adjust the
direction of airflow by moving the center control levers
or you can stop the airflow by moving the thumbwheel
located on each outlet downward.

3-11 Climate Control Personalization
(If Equipped)
This feature allows two different drivers to store and
recall their own climate control settings. These settings
include the set temperatures for the driver and front
passenger, the air conditioning, the airflow mode and
the fan speed. (This feature does not recall recirculation
or defrost).
Each driver (1 or 2) has a corresponding number located
on the back of the remote keyless entry transmitter.
Settings recalled by the system can be determined by
which transmitter is used to unlock the vehicle. When
the button with the unlock symbol is pressed, the
settings will be automatically recalled for that driver.
The settings can also be recalled when the key is placed
in the ignition. If the settings are recalled this way, the
system will recall the settings of the last driver to use the
vehicle. If these are not the correct settings for you,
press the button with the unlock symbol on remote
keyless entry transmitter that was used when you saved
your settings.The settings can also be recalled by briefly pressing the
corresponding memory button (1 or 2) located on the
driver's door panel.
Further programming for recalling climate control
personalization settings can be done using the DIC.
You can select or not select the following:

Automatic recall of the climate control settings when
the vehicle is unlocked with the remote keyless entry
transmitter, or

Automatic recall of the climate control settings when
a key is placed in the ignition.
For more programming information, see ªMemory and
Personalization Featuresº in the Index.

5-10
Towing Your Vehicle
Consult your dealer or a professional towing service if
you need to have your disabled vehicle towed. See
ªRoadside Assistanceº in the Index. If you want to tow
your vehicle behind another vehicle for recreational
purposes (such as behind a motorhome), see
ªRecreational Vehicle Towingº in the Index.
Engine Overheating
You will find an ENGINE COOLANT HOT, IDLE
ENGINE message or an ENGINE OVERHEATED,
STOP ENGINE message displayed in the Driver
Information Center (DIC). You will also hear a chime.
There is also an engine temperature warning light and/or
gage on the instrument panel cluster. See ªEngine
Coolant Temperature Warning Lightº or ªEngine
Coolant Temperature Gageº in the Index.
Overheated Engine Protection
Operating Mode
If an overheated engine condition exists and the message
ENGINE OVERHEATED, STOP ENGINE is displayed,
an overheat protection mode which alternates firing
groups of cylinders helps prevent engine damage. In this
mode, you will notice a loss in power and engine
performance. This operating mode allows your vehicle
to be driven to a safe place in an emergency; you may
drive up to 50 miles (80 km). Driving extended miles
(km) and/or towing a trailer in the overheat protection
mode should be avoided.
NOTICE:
After driving in the overheated engine protection
operating mode, to avoid engine damage, allow
the engine to cool before attempting any repair.
The engine oil will be severely degraded. Repair
the cause of coolant loss, change the oil and reset
the oil life system. See ªEngine Oilº in the Index.

5-12
NOTICE:
If your engine catches fire because you keep
driving with no coolant, your vehicle can be
badly damaged. The costly repairs would not be
covered by your warranty. See ªOverheated
Engine Protection Operating Modeº in the Index.
If No Steam Is Coming From Your Engine
An overheat warning, along with a low coolant message,
can indicate a serious problem. See ªLow Coolant
Messageº in the Index.
If you get an engine overheat warning with no low
coolant message, but see or hear no steam, the problem
may not be too serious. Sometimes the engine can get a
little too hot when you:

Climb a long hill on a hot day.

Stop after high
-speed driving.

Idle for long periods in traffic.

Tow a trailer.If you get the overheat warning with no sign of steam,
try this for a minute or so:
1. If your air conditioner is on, turn it off.
2. Set the temperature control to the highest heat setting
and open the windows, as necessary.
3. If you're in a traffic jam, shift to NEUTRAL (N);
otherwise, shift to the highest gear while
driving
-- AUTOMATIC OVERDRIVE (
)
or THIRD (3).
If you no longer have the overheat warning, you can
drive. Just to be safe, drive slower for about 10 minutes.
If the warning doesn't come back on, you can
drive normally.
If the warning continues, pull over, stop, and park your
vehicle right away.
If there's still no sign of steam, idle the engine for
three minutes while you're parked. If you still have the
warning, turn off the engine and get everyone out of the
vehicle until it cools down. Also, see ªOverheated
Engine Protection Operating Modeº listed previously in
this section.
You may decide not to lift the hood but to get service
help right away.