SUBARU IMPREZA WRX 2004 2.G Owners Manual

4-12
Climate control
functions are as follows:
OFF:
The fan does not operate.
AUTO: The fan speed is adjusted automatically in ac-
cordance with the air temperature inside and outside
the passenger compartment, the intensity of sunlight,
and other factors. Subaru recommends using the
AUTO position.
Other positions: The fan speed can be adjusted in
four steps.
NOTE
With the fan speed control dial in the AUTO posi-
tion and the air flow control dial in the “ ”,
“ ”, or “ ” position, the fan does not oper-
ate during engine warmup until the engine coolant
temperature exceeds approx. 122 °F (50 °C).
! Temperature control dial
This dial is used to set the desired interior tempera-
ture. With the dial set to your desired temperature, the
system automatically adjusts the temperature of air
supplied from the outlets such that the desired temper-
ature is achieved and maintained.
If the dial is turned fully counterclockwise, the system
gives maximum cooling performance. If the dial is
turned fully clockwise, the system gives maximum
heating performance. !
Air flow control dial
This dial has the following five positions. The outlets
from which air is supplied in each position are as fol-
lows:
: Instrument panel outlets: Instrument panel outlets and foot outlets
: Foot outlets and windshield defroster outlets (rel-
atively little air from windshield defroster outlets)
: Windshield defroster outlets and foot outlets
: Windshield defroster outlets
NOTE
When the dial is placed in the “ ” or “ ” po-
sition, the air conditioner compressor operates
automatically to defog the windshield quickly. At
the same time, the air inlet selection is automati-
cally set to “outside air” mode.

4-13
Climate control
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!Air inlet selection button
ON position (Recirculation): Interior air is recirculat-
ed inside the vehicle. Push the air inlet selection but-
ton to the ON position for fast cooling with the air con-
ditioner 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 selec-
tion 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.
Continued operation in the ON position 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 fol-
lows:
ON: The air conditioner operates while the fan is run-
ning.
Push the button to select this position. The indicator
light will illuminate.
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Climate control
OFF:
The air conditioner does not operate.
Push the button a second time to select this position.
The indicator light will go off.
NOTE
The air conditioner’s compressor does not oper-
ate with an outside temperature of 32 °F (0 °C) or
lower. ! Operating method
! Normal operation (automatic control)
To select automatic control of the fan speed and air
temperature, make the following settings: 1. Fan speed control dial: AUTO position
2. Air flow control dial: desired position
3. Air temperature control dial: desired position
4. Air inlet selection button: OFF position
5. Air conditioner button: ON position
NOTE
Even with the air conditioner button in the OFF po-
sition, the fan speed and air temperature are con-
trolled automatically. !
Heating
To direct warm air toward the floor, make the following settings:
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Climate control
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1. Fan speed control dial: AUTO position
2. Air flow control dial: position
3. Air temperature control dial: desired position
4. Air inlet selection button: OFF position
5. Air conditioner button: OFF position
NOTE "To heat the passenger compartment rapidly, set
the air temperature control dial to the 85 (30) posi-
tion and the air inlet selection button to the ON po-
sition. When the passenger compartment has
warmed up sufficiently, return the air inlet selec-
tion button to the OFF position. " Warm air also comes out from the right and left
air outlets. To stop warm air flow from these out-
lets, turn the corresponding knob clockwise. !
Rapid cooling
To cool the passenger compartment rapidly, make the
following settings:
1. Fan speed control dial: All the way to the right
2. Air flow control dial: “ ” position
3. Air temperature control dial: 65 (20) position
4. Air inlet selection button: ON position
5. Air conditioner button: ON position
NOTE
From time to time, return the air inlet selection but-
ton to the OFF position to draw outside air into the
passenger compartment.
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4-16
Climate control
!
Bi-level heating
It is possible to obtain air of different temperatures
from the instrument panel outlets and foot outlets. Air
from the foot outlets is slightly warmer than air from the
instrument panel outlets. Make the following settings:
1. Fan speed control dial: AUTO position
2. Air flow control dial: position
3. Air temperature control dial: desired position
4. Air inlet selection button: OFF position
5. Air conditioner button: ON position
NOTE
When driving on a dusty road or behind a vehicle
that emits unpleasant exhaust gases, set the air inlet selection button to the ON position. !
Defrosting or defogging the windshield
To direct warm air toward the windshield and front
door windows, make the following settings:
1. Fan speed control dial: desired position
2. Air flow control dial: position
3. Air temperature control dial: in 75 – 85 (25 – 30)
range
When the dial is placed in the “ ” position, the air
conditioner compressor operates automatically to de-
fog the windshield quickly. At the same time, the air in-
let selection is automatically set to “outside air” mode.
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Climate control
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NOTE "For rapid defrosting or defogging, set the fan
speed control dial to the highest speed position. " If air supplied from the outlets is too cold, the
windshield may become fogged on the outside.
Turn up the air temperature control dial slightly if
this happens." Warm air also comes out from the right and left
air outlets. To stop warm air flow from these out-
lets, turn the corresponding knob clockwise. ! Heating and defrosting
To direct warm air toward the floor and windshield,
make the following settings: 1. Fan speed control dial: desired position
2. Air flow control dial: position
3. Air temperature control dial: in 75 – 85 (25 – 30)
range
When the dial is placed in the “ ” position, the air
conditioner compressor operates automatically to de-
fog the windshield quickly. At the same time, the air in-
let selection is automatically set to “outside air” mode.
However, the air conditioner does not operate auto-
matically when the dial is placed in the “ ” position
after the dial has been placed in the “ ” position
and the air conditioner has been turned off manually.
NOTE "
If air supplied from the outlets is too cold, the
windshield may become fogged on the outside.
Turn up the air temperature control dial slightly if
this happens. " Warm air also comes out from the right and left
air outlets. To stop warm air flow from these out-
lets, turn the corresponding knob clockwise.
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4-18
Climate control
!
Temperature sensors
1) Interior air temperature sensor
2) Solar sensor
The semi-automatic climate control system employs
several sensors. These sensors are delicate. If they
are not treated properly and become damaged, the
system may not be able to control the interior temper-
ature correctly. To avoid damaging the sensors, ob-
serve the following precautions:
– 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 defroster grille
– Interior air temperature sensor: beside the fan
speed control dial
– Ambient temperature sensor: behind front grille.
2
1
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4-19
Climate control
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Operating tips for heater and air con-
ditioner !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 ac-
cumulation 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 cool-
ing efficiency. ! Lubrication oil circulation in the refrig- erant circuit
Operate the air conditioner compressor at a low en-
gine speed (at idle or low driving speeds) a few min-
utes each month during the off-season to circulate its
oil. ! Checking air conditioning system be-
fore summer season
Check the air conditioner unit for refrigerant leaks,
hose conditions, and proper operation each spring.
This check is best performed by your SUBARU dealer.
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Climate control
!
Cooling and dehumidifying in high hu-
midity and low temperature weather
conditions
Under certain weather conditions (high relative humid-
ity, 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 con-
ditioner compressor is designed to temporarily shut off
during air conditioner operation whenever the acceler-
ator is fully depressed such as during rapid accelera-
tion or when driving on a steep upgrade. ! Refrigerant for your climate control
system
Your air conditioner uses ozone friendly refrigerant
HFC134a. Therefore, the method 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 equipped)
If your vehicle’s air conditioning system is equipped
with an air filtration system, replace the filter element
according to the replacement schedule shown below.
This schedule should be followed to maintain the fil-
ter’s dust collection ability. Under extremely dusty con-
ditions, 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) whichev-
er comes first

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Climate control
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!Replacing an air filter
1. Remove the glove box. 1) Open the glove box.
2) Remove the nine screws and the one clip secur-
ing the glove box.
3) Disconnect the glove box light connector. 2. Unhook the hooks of the air filter cover and removethe cover.
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