2011 SUBARU IMPREZA Owners Manual

4-6Climate control
!Heating
To direct warm air toward the floor:
1. Set the air inlet selection button to the
OFF position.
2. Set the airflow control dial to the “
”
position.
3. Set the temperature control dial to the
most comfortable level.
4. Set the fan speed control dial to the
desired speed. !
Bi-level heating
This setting allows you to direct air of
different temperatures from the instrument
panel and foot outlets. The air from the
foot outlets is slightly warmer than from
the instrument panel outlets.
1. Set the air inlet selection button to the
OFF position.
2. Set the airflow control dial to the “
”
position.
3. Set the temperature control dial to the
desired temperature level.
4. Set the fan speed control dial to the
desired speed.
Setting the temperature control dial fully
turned to the red area or blue area
decreases the temperature difference
between the air from the instrument panel outlets and the air from the foot outlets. !
Ventilation
To force outside air through the instrument
panel outlets:
1. Set the air inlet selection button to the
OFF position.
2. Set the airflow control dial to the “
”
position.
3. Set the temperature control dial all the
way left.
4. Set the fan speed control dial to the
desired speed.
When driving on a dusty road, set the air
inlet selection button to the “ON ”position.
WARNING
Continued operation with the air

inletselectionbuttonintheON
position may fog up the windows.
Switch to the OFF position as soon
as the outside dusty conditionclears.
& Air conditioner operation
! Cooling or dehumidifying
1) ON position
For cooling and dehumidification of the
passenger compartment, performing the
following steps will allow air to flow
through the instrument panel outlets:
1. Set the air inlet selection button to the
OFF position.
2. Set the airflow control dial to the “
”
position. 3. Set the air conditioner button to the “
ON ”position.
4. Set the temperature control dial to the
blue side.
5. Set the fan speed control dial at the
highest speed. ! Defrosting or defogging
To direct warm air to the windshield and
front door windows:
1. Set the airflow control dial to the “
”
position.
2. Set the temperature control dial to the
red side.
3. Set the fan speed control dial at the
highest speed.
The air conditioner compressor automati-
cally operates when the airflow control dial set in the
“
”or “”position to provide
better defogging performance. Climate control
4-7

4-8Climate control
Automatic climate control
system (if equipped)
Although this climate control system can
be used as a full-automatic climate control
system, it can also, if desired, be used as
a semi-automatic climate control system.
When it is used as a full-automatic climate
control system, the outlet air temperature,
fan speed, airflow distribution, air inlet
control, and air conditioner compressor
operation are all automatically controlled
to maintain a constant, comfortable tem-
perature inside the vehicle. NOTE .Operate the automatic climate con-
trol system when the engine is running. . When the engine coolant is cold, the
blower does not run.. In the “AUTO ”mode, when the air
temperature in the passenger compart-
ment is sufficiently cool, the air condi-
tioner compressor does not operate.
For efficient defogging or dehumidify-
ing in cold weather, press the “A/C ”
button to operate the air conditioner
compressor. &
Control panel
1) Temperature control dial
2) Fan speed control dial
3) Airflow control dial
4) Control switch of the defogger and deicer
system (Refer to “Defogger and deicer ”
F 3-48.)
5) Air inlet selection button
6) Air conditioner button &
To use as full-automatic cli-
mate control system
Place the temperature control dial in the
position for your desired temperature, then
set the other dials and buttons as de-
scribed in the following. The system ’s
functions will then switch to AUTO mode
and be controlled automatically. . Airflow control dial: AUTO position
. Fan speed control dial: AUTO position
& To use as semi-automatic
climate control system
Each function can be individually set to
AUTO mode independently of the others.
Any function set to AUTO mode is con-
trolled automatically. Any function not set
to AUTO mode can be manually adjusted
as desired.
The temperature can be set within a range
of 65 to 85 8F (20 to 30 8C).

&Fan speed control dial
The fan operates only with the ignition
switch in the ON position. The fan speed
control dial is used to select the AUTO
(automatic control) mode or to select the
desired fan speed. The dial ’s positions
and their functions are as follows. OFF: The fan does not operate.
AUTO: The fan speed is adjusted auto-
maticallyinaccordancewiththeair
temperature inside and outside the pas-
senger compartment, the intensity of sun-
light, and other factors. SUBARU recom-
mends using the AUTO position.
Other positions: The fan speed can be
adjusted in 7 steps. NOTE
With the fan speed control dial in the
AUTO position and the airflow control
dial in the
“
”, “”,or “”position,
the fan does not operate during engine
warm-up until the engine coolant tem-
perature exceeds approximately 122 8F
(50 8C).
& Temperature control dial
This dial is used to set the desired interior
temperature. With the dial set to your
desired temperature, the system automa-
tically adjusts the temperature of air
supplied from the outlets such that the
desired temperature is achieved andmaintained.
If the dial is turned fully counterclockwise, the system gives maximum cooling per-
formance. If the dial is turned fully clock-
wise, the system gives maximum heatingperformance. &
Airflow control dial
Each dial position activates the following
air outlets. AUTO: The airflow control is adjusted
automatically in accordance with the air
temperature inside and outside the pas-
senger compartment, the intensity of sun-
light, and other factors. SUBARU recom-
mends using the AUTO position.
(Ventilation): Instrument panel outlets
(Bi-level): Instrument panel outlets and
foot outlets
(Heat): Foot outlets, both side outlets of Climate control
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4-10Climate control
the instrument panel and some through
windshield defroster outlets (A small
amount of air flows to the windshield and
both side windows to prevent fogging.)
(Heat-def): Windshield defroster out-
lets, foot outlets and both side outlets of
the instrument panel
: Windshield defroster outlets and both
side outlets of the instrument panel
For details, refer to “Airflow selection ”F 4-
2. NOTE
When the dial is placed in the “
”or
“” position, the air inlet selection is
automatically set to “outside air ”
mode. &
Air inlet selection buttonON position (recirculation): Interior air is
recirculated inside the vehicle. Push the
air inlet selection button to the ON position
for fast cooling with the air conditioner or
when driving on a dusty road. The
indicator light will illuminate.
OFF position (outside air): Outside air is
drawn into the passenger compartment.
Push the air inlet selection button to the
OFF position when the interior has cooled
to a comfortable temperature and the road
is no longer dusty. The indicator light will
turn off. AUTO: Turn the fan speed control dial and
airflow control dial to the AUTO position.
The air inlet control is then adjusted
automatically in accordance with the air
temperature inside and outside the pas- senger compartment, the intensity of sun-
light, and other factors. Pressing the air
inlet selection button cancels the
“AUTO ”
mode. To return to “AUTO ”mode, turn the
fan speed control dial or airflow control
dial to a position other than the AUTO
position. Then turn to “AUTO ”mode.
SUBARU recommends using the AUTOposition.
WARNING
Continued operation in the ON posi-
tion may fog up the windows. Switch
to the OFF position as soon as the
outside dusty condition clears.

&Air conditioner button
The button positions and their functions
are as follows. ON: The air conditioner operates while the
fan is running.
Push the button to select this position. The
indicator light will illuminate. OFF: The air conditioner does not oper-
ate.
Push the button again to select this
position. The indicator light will turn off. AUTO: Turn the fan speed control dial and
airflow control dial to the AUTO position.
The air conditioner compressor operation
is then adjusted automatically in accor-
dance with the air temperature inside and
outside the passenger compartment, the
intensity of sunlight, and other factors. Pressing the button cancels the
“AUTO ”
mode. To return to “AUTO ”mode, turn the
fan speed control dial or airflow control
dial to a position other than the AUTO
position. Then turn to “AUTO ”mode.
SUBARU recommends using the AUTOposition.
NOTE
The air conditioner ’s compressor does
not operate with an outside tempera-
ture of 32 8F(0 8C) or lower. &
Temperature sensors
1) Interior air temperature sensor
2) Solar sensor
The automatic climate control system
employs several sensors. These sensors
are delicate. If they are not treated Climate control
4-11
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4-12Climate control
properly and become damaged, the sys-
tem may not be able to control the interior
temperature correctly. To avoid damaging
the sensors, observe the following pre-cautions. –Do not subject the sensors to impact.
– Keep water away from the sensors.
– Do not cover the sensors.
The sensors are located as follows.– Solar sensor: beside the windshield
defroster grille.– Interior air temperature sensor: near
the ignition switch.– Outside temperature sensor: behind
the front grille. Operating tips for heater and
air conditioner &
Cleaning ventilation grille
Always keep the front ventilation inlet grille
free of snow, leaves, or other obstructions
to ensure efficient heating and defrosting.
Since the condenser is located in front of
the radiator, this area should be kept clean
because cooling performance is impaired
by any accumulation of insects and leaves
on the condenser. &Efficient cooling after parking
in direct sunlight
After parking in direct sunlight, drive with
the windows open for a few minutes to
allow outside air to circulate into the heated interior. This results in quicker
cooling by the air conditioner. Keep the
windows closed during the operation of
the air conditioner for maximum cooling
efficiency. &
Lubrication oil circulation in
the refrigerant circuit
Operate the air conditioner compressor at
a low engine speed (at idle or low driving
speeds) a few minutes each month during
the off-season to circulate its oil. & Checking air conditioning
system before summer sea-son
Check the air conditioner unit for refriger-
ant leaks, hose conditions, and proper
operation each spring. Have the air con-
ditioning system checked by your
SUBARU dealer. & Cooling and dehumidifying in
high humidity and low tem-
perature weather conditions
Under certain weather conditions (high
relative humidity, low temperatures, etc.) a
small amount of water vapor emission
from the air outlets may be noticed. This
condition is normal and does not indicate
any problem with the air conditioning

system. &Air conditioner compressor
shut-off when engine is
heavily loaded
To improve acceleration and gas mileage,
the air conditioner compressor is designed
to temporarily shut off during air condi-
tioner operation whenever the accelerator
is fully depressed such as during rapid
acceleration or when driving on a steepupgrade. & Refrigerant for your climate
control system
Your air conditioner uses ozone friendly
refrigerant HFC134a. Therefore, the meth-
od of adding, changing or checking the
refrigerant is different from the method for
CFC12 (freon). Consult your SUBARU
dealer for service. Repairs needed as a
result of using the wrong refrigerant are
not covered under warranty. Air filtration system
Replace the filter element according to the
replacement schedule as follows. This
schedule should be followed to maintain
the filter
’s dust collection ability. Under
extremely dusty conditions, the filter
should be replaced more frequently. It is
recommended that you have your filter
checked or replaced by your SUBARU
dealer. For replacement, use only a
genuine SUBARU air filter kit.
Replacement schedule: Every 12 months or 7,500 miles (12,000
km) whichever comes first
CAUTION
Contact your SUBARU dealer if the
following occurs, even if it is not yet
time to change the filter: . Reduction of the airflow through
the vents.
. Windshield gets easily fogged or
misted.
NOTE
The filter can influence the air condi-
tioning, heating and defroster perfor- mance if not properly maintained. &
Replacing an air filter
1. Remove the glove box. (1) Open the glove box.(2) Remove the damper shaft from the
glove box. Climate control
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