2004 Alfa Romeo 156 climate control

GETTING TO KNOW YOUR CAR
127
CLIMATE CONTROL
COMPRESSOR ON/OFF
ENABLE BUTTON
√
(fig. 109)
Pressing button (12)
√
enables the turn-
ing on of the climate control compressor.
This condition is shown by the lighting up of
the led placed on the button itself.
When the climate control compressor is
turned off, the leds on buttons (14)
AUTO
and (12)
√
go off; automatic inside air re-
circulation control is also excluded (both leds
off on button 7
v
) which always stays
off to prevent window misting; in any case,
the automatic operation of inside air recir-
culation can be resumed (though it is not
recommended) by pressing button 7
v
.
fig. 109
A0B0070m

GETTING TO KNOW YOUR CAR
128
When the climate control compressor is off,
it is not possible to admit air to the pas-
senger compartment with a temperature be-
low the outside temperature; in this case,
the value flashes on the display concerning
the temperature that cannot be reached
and the left led on button (14
AUTO
-
fig. 110) goes off.
The switching off of the climate control
compressor remains in storage even when
the engine has been stopped. To resume au-
tomatic control for switching on the climate
control compressor, press button (12) √
again, the button led will turn on, or press
button (14)
AUTO
; in which case, the other
manual settings set will be cancelled.
fig. 110
A0B0071m
Operation of the climate
control compressor is nec-
essary for cooling and dehumidify-
ing the air; it is advisable to keep
this function always on, to prevent
window misting problems.
WARNING

GETTING TO KNOW YOUR CAR
130
With the outside temper-
ature below 2°C the cli-
mate control compressor is unable
to work. It is therefore inadvisable
to use the inside air recirculation
function v
with low outside tem-
perature as windows may mist
over quickly.WARNING
The inside air recirculation
function makes it possible
to reach the required “heating” or
“cooling” conditions faster. It is
however inadvisable to use it on
rainy/cold days as it would con-
siderably increase the possibility of
the windows misting inside, espe-
cially if the climate control system
is off.
WARNING
It is advisable to turn on the
inside air recirculation sys-
tem in queues or tunnels to avoid
admitting polluted air from outside.
The prolonged use of this function
should however be avoided, espe-
cially with several persons on
board, to avoid the possibility of the
windows misting inside.
WARNING
In certain weather condi-
tions (e.g. outside temper-
ature around 0°C) and with auto-
matic air recirculation control on,
mist may form on the windows. In
this case press the inside air re-
circulation button (7)
v
, to
switch off recirculation (leds on
button off) and if necessary in-
crease the flow of air to the wind-
screen.
WARNING

GETTING TO KNOW YOUR CAR
132
fig. 113
A0B0074m
QUICK FRONT WINDOW
DEMISTING/DEFROSTING
BUTTON
(-
MAX
-DEF
function)
(fig. 113)
Pressing button (10)
-
the climate con-
trol automatically activates timed operation
of all the functions needed to quicken
demisting/defrosting of the windscreen and
front side windows, i.e.:
– it turns on the climate control compres-
sor;
– switches off inside air recirculation, if on
(both leds off);
– sets the maximum air temperature (HI)
on both displays (2) and (5);
– operates the fan at a predefined speed;
– directs the flow of air towards the wind-
screen and front side window vents;
– turns on rearscreen heating and, if pre-
sent, the wing mirror coils.
When the maximum demisting/defrost-
ing function is on, the led on button (10)
-
, the led on the rearscreen heating but-
ton (9)
(
and the led on button (12)
√
come on; at the same time the leds on
button (7)
v
go out.WARNINGIf the engine is not warm
enough, the function will not engage the
predefined fan speed immediately, to limit
the flow to the passenger compartment of
air that is not warm enough to demist the
windows.

GETTING TO KNOW YOUR CAR
133
When the maximum demisting/defrost-
ing function is on, the only manual opera-
tions possible are manual adjustment of the
fan and switching rearscreen heating off.
Pressing one of the following buttons:
(10)
-
, (7)
v
, (11)
MONO
, (14)
AUTO
or (12)
√
the system switches off
the maximum demisting/defrosting func-
tion, resuming the system operating condi-
tions prior to turning it on, in addition to
activating the last function required, if any.
WING MIRROR AND
REARSCREEN DEFROSTING/
DEMISTING BUTTON
(
(fig. 114)
Pressing button (9)
(
, turns on demist-
ing/defrosting of the rearscreen and, if pre-
sent, the wing mirror coils.
The activation of this function is shown
by the turning on of the led on the button.
This function is timed and switches off au-
tomatically after 20 minutes, or pressing the
button again; the function is also switched
off when the engine is stopped and will not
be switched on again the next time the en-
gine is started.WARNING Rear heated window man-
ual on/off control prevails over automatic
activation decided by the climate control sys-
tem control unit.
fig. 114
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GETTING TO KNOW YOUR CAR
134
This function is timed and switches off au-
tomatically after 20 minutes, or pressing the
button again; the function is also switched
off when the engine is stopped and will not
be switched on again the next time the en-
gine is started.
WARNINGThe system turns on
rearscreen heating automatically if the tem-
perature is below 3°C.
WARNINGDo not apply stickers on the
inside of the rearscreen over the heating fil-
aments to avoid damage that might cause
it to stop working properly.
WARNINGWhen reconnecting the neg-
ative battery cable after having disconnected
it, wait for 2 minutes before turning the key
to enable the climate control system to re-
set actuator strokes properly.
POLLEN FILTER This filter has the specific capability of com-
bining the mechanical filtering of the air with
an electrostatic effect so that the outside air
admitted to the passenger compartment is
purified and free from particles such as dust,
pollen, etc.
In addition to the above, it also effectively
reduces the concentration of pollutants.
The filtering action takes place under all
air inlet conditions and it is clearly most ef-
fective with the windows shut.
Have the conditions of the filter checked by
Alfa Romeo Authorized Services at least once
a year, preferably on the onset of summer.If the vehicle is used mainly in polluted
or dusty areas it should be checked and if
necessary replaced, at shorter intervals.
Failure to replace the fil-
ter may considerably re-
duce the effectiveness of
the climate control system up to
blocking the air flow from the out-
lets and vents.

GETTING TO KNOW YOUR CAR
187
ENVIRONMENTAL
PROTECTIONThe design and construction of the vehi-
cle have not only been developed with the
traditional aspects of performance and
safety in mind, but also take into account
the increasingly pressing problems tied to
protecting the environment.
The choice of materials, techniques and
particular parts are the result of work which
has made it possible to drastically reduce
the harmful effects on the environment and
guarantee respect for the severest interna-
tional norms.USE OF NON-TOXIC
MATERIALSNone of the components of the vehicle con-
tains asbestos. The padding and the climate
control system do not contain CFCs which
are held to be responsible for the depletion
of the ozone layer.
The colouring agents and the corrosion in-
hibitors used on the nuts, screws and bolts
do not contain cadmium any more, which
could pollute the atmosphere or water tables.
PARKING SENSORS
(WHERE PROVIDED)(optional for versions/markets
where applicable)
The parking system detects and informs
the driver (through an intermittent acoustic
signal) about the presence of obstacles in
the rear part of the car (fig. 179). ACTIVATIONThe sensors are automatically activated
when the reverse gear is engaged.
The sound produced by the acoustic alarm
becomes continuous when the distance be-
tween the car and the obstacle is less that
30 cm.
ACOUSTIC SIGNALWhen the reverse gear is engaged an in-
termittent acoustic signal is automatically
activated.
The acoustic signal:
– raises with the reduction of distance be-
tween the car and the obstacle;
– becomes continuous when the distance
between the car and the obstacle is less that
30 cm and stops if the distance raises.
– is constant if the distance is unvaried.
If this situation takes place for side sensors,
the signal is stopped after about 3 seconds
to prevent sound indications when per-
forming manoeuvres near walls.fig. 179
A0B0609m

IN AN EMERGENCY
237
Remove the cover (A-fig. 73) to
gain access to the following relays/fuses
(fig. 74):
A.Engine radiator cooling fan 2
ndspeed
relay (T.SPARK versions).
B.Engine radiator cooling fan 1
stspeed re-
lay.
C.Fuel pump relay
D.Electronic injection relay
E.Climate control compressor relay
F.Timing variator relay (1.6 T.SPARK on-
ly) or engine radiator fan 2
ndspeed relay
(only 2.5 V6 24V, JTD and JTD 16V Multi-
jet versions).
G.Fuel oil heater relay (only Diesel ver-
sions).For JTD 20v Multijet version refer to
fig. 75For Diesel versions, depending on the op-
tions installed, there is a second bracket fas-
tened to the engine compartment rear bulk-
head for the following fuses (fig. 76):
A.MAXI-FUSE 30A: additional passenger
compartment heater 2
ndlevel relay.
B.MAXI-FUSE 30A: additional passenger
compartment heater 1stlevel relay.
WARNINGStrictly observe the specified
fuse ampere value: in case of doubt, con-
tact Alfa Romeo Authorized Services.
fig. 74
A0B0183m
fig. 76
A0B0619m
fig. 75
A0B0618m