PONTIAC BONNEVILLE 2000 Owners Manual

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3-2
Comfort Controls
This section tells you how to make your air system work
for you.
With these systems, you can control the heating, cooling
and ventilation in your vehicle. Your vehicle also has a
flow
-through ventilation system described later in
this section.
Your vehicle may be equipped with a passenger
compartment air filter. For more information, see
ªPassenger Compartment Air Filterº in the Index.
Comfort Controls Personalization
(If Equipped)
This feature allows two different drivers to store and
recall their own climate control settings for temperature,
air delivery mode and fan speed. The personal choice
settings recalled are determined by the transmitter used
to enter the vehicle. After the button with the unlock
symbol on a remote keyless entry transmitter is pressed,
and the ignition is in RUN, the climate control will
adjust to the last settings of the identified driver. The
settings can also be changed by pressing one of the
memory buttons (1 or 2) located on the driver's door,
until you hear two beeps. When adjustments are made,
the new settings are automatically saved for that driver.
Standard Climate Control System
Fan Knob
The left knob regulates the force of the air coming
through the system. Turn the knob clockwise to increase
the fan speed and counterclockwise to decrease the fan
speed. Push the knob to turn the fan off. The fan must
be on to run the air conditioning compressor.
Temperature Knob
The right knob regulates the temperature of the air
coming through the system. Turn it toward the blue area
for cooler air. Turn it toward the red area for warmer air.

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Mode Buttons
You may choose the direction of air delivery by
selecting one of the five mode control buttons.
PANEL: This setting directs airflow through the
upper air outlets located in the instrument panel.
BI-LEVEL: This setting directs airflow through
both the upper air outlets and the lower floor outlets.
There is also a small amount of air directed to the front
defroster and the side window defrosters.
FLOOR: This setting directs most of the airflow
to the lower floor outlets with some airflow directed to
the side window defrosters. There is also a small amount
of airflow directed to the front defroster.
DEFOG: This setting directs most of the airflow
to the lower floor outlets and the front windshield
defroster. A small amount of airflow is directed to the
side window defroster outlets. This mode can be useful
to remove the moisture from the inside of the windshield
when the outside temperature is cold or the humidity
is high.
FRONT: This setting directs most of the airflow
to the front windshield defroster with some airflow to
the side window defrosters and lower floor outlets.
To improve windshield clearing performance when you
select FRONT defrost, your air conditioning compressor
will run automatically above approximately 40
F (4
C).
This dehumidifies the air to help dry the windshield.
Even though the compressor may be running, the A/C
light will not come on in FRONT defrost unless you
select A/C.
Recirc Button
RECIRC: Press this button to limit the amount
of outside air entering your vehicle. This is helpful when
you are trying to quickly cool the interior of the vehicle
or to limit odors entering the vehicle. RECIRC may be
selected in all manual airflow modes except FRONT
defrost. If you select RECIRC while in defrost, the
RECIRC light will flash to let you know that this is
not allowed. This is to help prevent fogging.

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When the weather is cool or damp, operating in
RECIRC for extended periods of time may cause
fogging of the vehicle's windows. To clear the fog,
switch back to outside air by turning off RECIRC, select
either DEFOG or FRONT defrost mode and increase the
fan speed. To avoid refogging of the windows, minimize
your use of RECIRC under these conditions and turn the
A/C on to help dehumidify the air.
A/C Button
A/C: Press this button to turn the air conditioning
compressor on and off. The system will cool and
dehumidify the air inside your vehicle. If your comfort
control system is off, you can also turn it back on in
PANEL mode by selecting the A/C button.
Even though A/C is not selected, in FRONT defrost
mode the A/C compressor will run automatically at
temperatures over approximately 40
F (4
C) to
improve windshield clearing performance.
Electronic Climate Control System (Option)
Temperature Knob (Driver's Side)
The driver's side knob changes the temperature of the
air coming through the system on the driver's side.
Turn the knob toward the blue area to decrease the
set temperature. Turn the knob toward the red area to
increase the set temperature. When this knob is adjusted,
the word DRIVER will be displayed under the set
temperature. When the passenger's set temperature is
not active, this knob controls both the driver's and
passenger's side, and both DRIVER and PASS will be
displayed under the set temperature.

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Temperature Knob (Passenger's Side)
The passenger's side knob changes the temperature of
the air coming through the system on the passenger's
side of the vehicle. Turn the knob toward the blue area
to decrease the set temperature. Turn the knob toward
the red area to increase the set temperature. When this
knob is adjusted, only the word PASS will be displayed
under the set temperature.
Fan Button
The button with the fan symbol allows you to manually
adjust the fan speed. Press the HIGH side to increase fan
speed and the LOW side to decrease fan speed.
Mode Button
Press this button to manually select the air delivery mode
to the floor, panel or windshield outlets. The system will
stay in the selected mode until the MODE or AUTO
button is pushed.Auto Button
Press the AUTO button to set the system to
automatically control the air delivery mode, fan speed,
A/C and RECIRC operations. Whenever you press
AUTO, the display will change to show the current
driver set temperature, automatic air delivery mode and
fan speed. After five seconds the display will change
back to the EXT (external) temperature outside
the vehicle.
Display
In full AUTO mode, the electronic climate control
system display will show the outside temperature,
labeled EXT for external temperature, and AUTO.
If you press the MODE button to select an air delivery
mode, the display will change to also show you the
current system mode. If you press HIGH or LOW on the
fan button, the display will change to show the selected
fan speed. After five seconds, the display will change
back to show the EXT temperature and the selected
manual setting.

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Automatic Operation
When the system is set for AUTO, your climate control
system will control the air delivery mode, fan speed,
A/C and RECIRC operations. Air will come from
the floor, panel or windshield outlets. The fan speed
will vary as the system maintains the selected
temperature setting.
When AUTO is selected, the A/C operation and air inlet
will be automatically controlled. The air conditioning
compressor will run at outside temperatures over
approximately 40
F (4
C). The air inlet will normally
be set to outside air. If it's hot outside, the air inlet will
automatically switch to recirculated inside air to help
quickly cool down your vehicle.
To find your comfort zone, start with 75
F (24
C)
temperature setting and allow about 20 minutes for the
system to regulate. Turn the TEMP knob up or down to
adjust the temperature setting if necessary. If you choose
the temperature setting of 60
F (15
C), the system will
remain at the maximum cooling setting and fan speed.
If you choose the temperature setting of 90
F (33
C),
the system will remain at the maximum heat setting and
fan speed. Choosing either maximum setting will not
cause the system to heat or cool any faster.Be careful not to cover the sensor located on the top of
the instrument panel near the windshield. This sensor
regulates temperature based on sun load.
The EXT (exterior) temperature sensor is located in the
front of the vehicle behind the grille. The displayed
temperature is most accurate after the vehicle has been
moving for a few minutes. If the vehicle is stopped and
then restarted within 2 1/2 hours, the sensor will be hot
from the engine heat. In this case, the temperature first
displayed will continue to be the previous temperature.
The display will update after the vehicle has been
moving for a few minutes and the sensor has a chance
to cool down to the actual temperature.
To avoid blowing cold air in cold weather, the system
will delay turning on the fan until warm air is available.
The length of delay depends on engine coolant
temperature. Pushing the fan button will override this
delay and change the fan to a selected speed.

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Manual Operation
You may also manually adjust the air delivery mode or
fan speed.
FLOOR: Manually selecting FLOOR mode by
cycling through the MODE settings will deliver air to
the floor outlets.
DEFOG: Manually selecting DEFOG by cycling
through the MODE settings will deliver air to the floor
and windshield outlets.
BI-LEVEL: Manually selecting BI-LEVEL
by cycling through the MODE settings will deliver
warm air to the floor and cooler air to the instrument
panel outlets.
PANEL: Manually selecting PANEL by cycling
through the MODE setting will deliver air to the
instrument panel outlets.
DRIVER PUSH OFF: Press this knob to turn the
system off. Some fresh air will continue to flow through
the vehicle from the FLOOR outlets, and the system will
try to maintain the previously chosen comfort setting.PASSENGER PUSH OFF: Press this knob to cancel
the passenger's set temperature. The passenger's set
temperature will be set equal to the driver's set
temperature. Both the words DRIVER and PASS will be
displayed under the set temperature in the display area.
A/C: Press this button to turn the air conditioning
compressor on and off. When A/C is selected or in
AUTO mode, the system will run the A/C automatically
to cool and dehumidify the air inside the vehicle. If you
select A/C OFF while in FRONT defrost, the A/C OFF
text will flash to let you know this is not allowed. This is
to prevent fogging.
RECIRC: Press this button to limit the amount
of outside air entering your vehicle. You may use this
setting to limit odors entering your vehicle. Press
RECIRC to recirculate inside air until the RECIRC
button is pressed again or the OUTSIDE AIR button
is pressed.
If you select RECIRC while in defrost the RECIRC light
will flash to let you know this is not allowed. This is to
prevent fogging.

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When the weather is cool or damp, operating in
RECIRC for extended periods of time may cause
fogging of the vehicle's windows. To clear the fog, press
the OUTSIDE AIR button and select either DEFOG or
FRONT defrost. Be sure A/C OFF is not selected to
allow the air conditioning compressor to run
automatically and help dehumidify the air.
OUTSIDE AIR: Press this button to allow fresh
air to enter your vehicle if you currently have RECIRC
selected. You may also override the system's automatic
use of RECIRC by selecting OUTSIDE AIR.
FRONT: Press this button to clear the windshield.
The system will automatically control the fan speed if
you select defrost from AUTO. If the outside
temperature is 38
F (3
C) or warmer, your air
conditioning compressor will automatically run to help
dehumidify the air and dry the windshield.
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.
If you have the standard system, for quick cool
-down on
very hot days, use the airflow from the PANEL outlets,
press RECIRC and A/C with the temperature knob in
the blue area. If this max A/C setting is used for long
periods of time, the air in your vehicle may become too
cold and dry. For normal cooling on hot days, use
A/C without RECIRC with the temperature knob in the
blue area.
If you have the electronic system, in AUTO mode
the system will cool and dehumidify the air inside the
vehicle. Also while in AUTO mode, the system
will maximize its performance by using RECIRC
as necessary.
On cool, but sunny days, with the standard system or
through manual operation of the electronic system, use
BI
-LEVEL to deliver warm air to the floor and cooler
air to the instrument panel outlets. To warm or cool the
air delivered, turn the TEMP knob up or down.

3-9 Heating
If you have the standard system, on cold days use
FLOOR with the temperature knob in the red area. If
you have the electronic system, press AUTO and adjust
the temperature by turning the TEMP knob up or down.
You may also adjust the electronic system manually by
pressing the MODE button and selecting FLOOR.
Again, adjust the temperature by turning the TEMP
knob up or down.
With either system, outside air will be heated and sent
through the floor outlets. The heater works best if you
keep your windows closed while using it.
Defogging and Defrosting
On cool, humid days, use DEFOG to keep the
windshield and side windows clear. Use FRONT defrost
to remove fog or ice from the windshield quickly in
extremely humid or cold conditions.
If you have the standard system, select DEFOG and
adjust the fan speed to your comfort level. Turn the A/C
on to help dehumidify the air. Use FRONT defrost with
the temperature toward the red area and the fan control
toward high.
If you have the electronic system and select FRONT
defrost or DEFOG from AUTO, the system will control
the fan speed. Adjust the temperature and fan speed to
your comfort level. After the windshield is clear, adjust
the temperature to your normal setting and select the
AUTO button and return to AUTO mode and
fan control.
For maximum FRONT defrost performance under
extreme icing or frosting conditions, increase the
temperature setting to 90
F (33
C) and increase the
fan speed to high.

3-10 Rear Window Defogger
The lines you see on the
rear window warm the
glass. Press the button to
start warming your window.
A light will glow in the
button while the defogger
is working.
If your vehicle is equipped with heated mirrors, this
button will activate them.
After 10 minutes it will turn off by itself, or press the
button during the heating cycle to turn it off. If you need
additional warming time, push the button again. The
system will then operate for five minutes before turning
off by itself. If your speed is maintained over 30 mph
(48 km/h), the rear defog will not turn off automatically
to help keep the rear glass clear.
Do not attach a temporary vehicle license, tape or decals
across the defogger grid on the rear window.NOTICE:
Do not try to clear frost or other material from
the inside of the rear window with a razor blade
or anything else that is sharp. This may damage
the defogger grid. The repairs wouldn't be
covered by your warranty.
Ventilation System
For mild outside temperatures when little heating or
cooling is needed, use the panel outlet setting (on the
standard system) to direct outside air through your
vehicle. Air will flow through the instrument
panel outlets.
Your vehicle's flow
-through ventilation system supplies
outside air into the vehicle when it's moving. When the
vehicle is not moving, you can get outside air to flow
through by selecting any air delivery mode and any
fan speed.