cooling SUBARU IMPREZA WRX 2007 3.G Owners Manual

Ventilator.............................................................. 4-2
Air flow selection ................................................ 4-2
Center and side ventilators .................................. 4-3
Manual climate control system (if equipped) ..................................................... 4-3
Control panel ...................................................... 4-3
Heater operation ................................................. 4-5
Air conditioner operation (if equipped) ...................................................... 4-7
Automatic climate control system (if equipped) ..................................................... 4-8
Control panel ...................................................... 4-8
To use as full-automatic climate control system .............................................................. 4-8
To use as semi-automatic climate control system .............................................................. 4-8
Fan speed control dial ......................................... 4-9
Temperature control dial ...................................... 4-9
Air flow control dial ............................................. 4-9 Air inlet selection button
.................................... 4-10
Air conditioner button ........................................ 4-10
Temperature sensors ......................................... 4-11
Operating tips for heater and air conditioner ...................................................... 4-11
Cleaning ventilation grille ................................... 4-11
Efficient cooling after parking in direct sunlight ........................................................... 4-11
Lubrication oil circulation in the refrigerant circuit .............................................................. 4-12
Checking air conditioning system before summer season ............................................................ 4-12
Cooling and dehumidifying in high humidity and low temperature weather conditions ................. 4-12
Air conditioner compressor shut-off when engine is heavily loaded .............................................. 4-12
Refrigerant for your climate control system ... ..... 4-12
Air filtration system ........................................... 4-12
Replacing the air filter ........................................ 4-13Climate control
4

4-4Climate control
!Fan speed control dial
The fan operates only when the ignition
switch is turned to the “ON ”position. The
fan speed control dial is used to select 4
fan speeds. ! Air flow control dial
This dial has the following five positions:
: Air flows through the instrument panel
outlets.
: Air flows through the instrument panel
outlets and the foot outlets.
: Air flows through the foot outlets and
some through the windshield defroster outlets.
: Air flows through the windshield
defroster outlets and foot outlets.
: Air flows through the windshield
defroster outlets. NOTE . You will find the notation “USE WITH
” on the air flow control dial plate.
This is intended to remind you to set
the air inlet selection lever in the “
”
position when defogging the wind- shield.
Defogging with the air inlet selection
lever set in the “
”position provides better defogging performance than in the
“
”position.
. When the dial is placed in the “”
or “”position, the air conditioner
compressor operates automatically re-
gardless of the position of the air
conditioner button to defog the wind-
shield quickly.
However the indicator on the air con-
ditioner button will not come on.
Also, you cannot stop the air condi-
tioner compressor by pressing the air
conditioner button. ! Air conditioner button (if equipped)
The air conditioner operates only when
the engine is running.
Push the air conditioner button while the fan is in operation to turn on the air
conditioner. The indicator light will comeon.
Push it again to turn off the air conditioner. !
Air inlet selection lever
(Recirculation): Interior air is recircu-
lated inside the vehicle.
Place the air inlet selection lever in the “
” position for fast cooling with the air
conditioner or when driving on a dusty road.
(Outside air): Outside air is drawn into
the passenger compartment.
Place the air inlet selection lever in the “
” position when the interior has cooled
to a comfortable temperature and the road
is no longer dusty.
WARNING
Continued operation in the “
”
position may fog up the windows.
Switch to the “
”position as soon
as the outside dusty condition clears.

WARNING
Continued operation in the “
”
position may fog up the windows.
Switch to the “
”position as soon
as the outside dusty condition clears.
& Air conditioner operation (if equipped)
! Cooling or dehumidifying
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 lever to the “
”position. 2. Set the air flow 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
desired speed. ! Defrosting or defogging
To direct warm air to the windshield and
front door windows:
1. Set the air inlet selection lever to the “
”position.
2. Set the air outlet control dial to the “
” position.
3. Set the temperature control dial to the
red side. 4. Set the fan speed control dial at the
highest speed.
The air conditioner compressor automati-
cally operates when the air flow control
dial set in the
“
”or “”position to
provide better defogging performance.
However, the air conditioner indicator light
does not come on at this time. 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, air flow 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.. Even when cooling is not necessary,
setting the temperature much lower
than the current outlet air temperature
turns on the air conditioner compres- sor automatically and the
“A/C ”indi-
cator light on the control panel comeson. & Control panel
1) Air flow control dial
2) Fan speed control dial
3) Temperature control dial
4) Air conditioner button
5) Air inlet selection button
6) Rear window defogger button (Refer to
the“Rear window defogger button ”sec-
tion in chapter 3.)
& 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. . Air flow control dial: AUTO position
. Fan speed control dial: AUTO position
. Air inlet selection button: Press for at
least 1 second. (Indicator will flash twice.). Air conditioner button: Press for at least
1 second. (Indicator will flash twice.)
& 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 25 steps. NOTE
With the fan speed control dial in the
AUTO position and the air flow control
dial in the
“
”, “”,or “”position,
the fan does not operate during engine
warm-up until the engine coolant tem-
perature exceeds approx. 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. &
Air flow control dial
This dial has the following six positions.
The outlets from which air is supplied in
each position are as follows: AUTO: The air flow 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.
: Instrument panel outlets
: Instrument panel outlets and foot
outlets
: Foot outlets and windshield defroster Climate control
4-9
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4-10Climate control
outlets (relatively little air from windshield
defroster outlets)
: Windshield defroster outlets and foot
outlets
: Windshield defroster outlets
NOTE
When the dial is placed in the “
”or
“” position, the air conditioner com-
pressor operates automatically to de-
fog the windshield quickly. At the same
time, the air inlet selection is automa-
tically set to “outside air ”mode.
& Air inlet selection button
ON 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 come on.
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
go off. AUTO: When the air inlet selection button
is pressed for at least one second, the
indicator flashes twice. The air inlet control
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 air inlet selection button
cancels the “AUTO ”mode. SUBARU
recommends using the AUTO position.
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 ’s 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 go off. AUTO: When the button is pressed for at
least one second, the indicator flashes
twice. The air conditioner compressor
operation is then adjusted automatically
in accordance with the air temperature
inside and outside the passenger com-
partment, the intensity of sunlight, and

other factors. Pressing the button cancels the“AUTO ”mode. SUBARU recommends
using the AUTO position.
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
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 windshield defros-
ter grille– Interior air temperature sensor: beside
the fan speed control dial– Outside temperature sensor: behind
front grille. Operating tips for heater and
air conditioner &
Cleaning ventilation grille
Always keep the front ventilator 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 Climate control
4-11
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4-12Climate control
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 of each spring. Have your
SUBARU dealer perform this check. & 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 conditioningsystem. &
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
If your vehicle
’s air conditioning system is
equipped with an air filtration system,
replace the filter element according to
the replacement schedule shown in the
following. This schedule should be fol-
lowed to maintain the filter ’s dust collec-
tion ability. Under extremely dusty condi-
tions, 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

eye protectors, and remove metal
objects such as rings, bands or
other metal jewelry.
. Be sure the jumper cables and
clamps on them do not have
loose or missing insulation.
Do not jump start unless cables
in suitable condition are avail-able.
. A running engine can be danger-
ous. Keep your fingers, hands,
clothing, hair and tools away
from the cooling fan, belts and
any other moving engine parts.
Removing rings, watches and
ties is advisable.
. Jump starting is dangerous if it
done incorrectly. If you are un-
sure about the proper procedure
for jump starting, consult a com-
petent mechanic.
When your vehicle does not start due to a
run down (discharged) battery, the vehicle
may be jump started by connecting your
battery to another battery (called the
booster battery) with jumper cables.
& How to jump start
1. Make sure the booster battery is 12
volts and the negative terminal is grounded.
2. If the booster battery is in another
vehicle, do not let the two vehicles touch.
3. Turn off all unnecessary lights and accessories.
4. Connect the jumper cables exactly in
the sequence illustrated.
In case of emergency
9-9
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Engine overheating
WARNING
Never attempt to remove the radia-
tor cap until the engine has been
shut off and has fully cooled down.
When the engine is hot, the coolant
is under pressure. Removing the
cap while the engine is still hot
could release a spray of boiling hot
coolant, which could burn you very
seriously.
If the engine overheats, safely pull off the
road and stop the vehicle in a safe place. & If steam is coming from the
engine compartment
Turn off the engine and get everyone
away from the vehicle until it cools down. & If no steam is coming from
the engine compartment
1. Keep the engine running at idling speed.
2. Open the hood to ventilate the engine compartment.
Confirm that the cooling fan is turning. If
the fan is not turning, immediately turn off the engine and contact your authorized
dealer for repair.
3. After the engine coolant temperature
has dropped, turn off the engine.
If the temperature gauge stays at the
overheated zone, turn off the engine.
4. After the engine has fully cooled down,
check the coolant level in the reservetank.
If the coolant level is below the
“LOW ”
mark, add coolant up to the “FULL ”mark.
5. If there is no coolant in the reserve
tank, add coolant to the reserve tank.
Then remove the radiator cap and fill the
radiator with coolant.
If you remove the radiator cap from a hot
radiator, first wrap a thick cloth around the
radiator cap, then turn the cap counter-
clockwise slowly without pressing down
until it stops. Release the pressure from
the radiator. After the pressure has been
fully released, remove the cap by pressing
down and turning it. Towing
If towing is necessary, it is best done by
your SUBARU dealer or a commercial
towing service. Observe the following
procedures for safety.
WARNING
Never tow AWD vehicles (both AT
and MT) with the front wheels raised
off the ground while the rear wheels
are on the ground, or with the rear
wheels raised off the ground while
the front wheels are on the ground.
This will cause the vehicle to spin
away due to the operation or dete-
rioration of the center differential. In case of emergency
9-11
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