2004 Alfa Romeo 156 heating

GETTING TO KNOW YOUR CAR
120
AIR TEMPERATURE
ADJUSTMENT KNOBS
(fig. 102)
Turning the rings of knobs (1or 6) clock-
wise or counterclockwise, respectively high-
ers or lowers the temperature of the air re-
quired in the left zone (knob 1) or right
zone (knob 6) of the passenger compart-
ment. The temperatures set are shown on
the displays (2) and (5) placed below the
respective knobs.
Separate operation of the temperatures set
is restored automatically using knob (6) is
actuated.
Turning the knob rings clockwise or coun-
terclockwise, until they reach the extreme
selection positions HIor LO, will cause the
maximum heating or cooling functions, re-
spectively, to be switched on:
fig. 102
A0B0063m

GETTING TO KNOW YOUR CAR
121
fig. 103
A0B0064m
HI function
(highest heating power - fig. 103)
It is switched on by setting a temperature
of more than 32.5°C on the display, and
can be switched on independently from the
driver’s or passenger’s side, or both of them;
this setting brings the system to the “one-
zone” mode and is shown by both displays.
This functions can be switched on when
you wish to heat the passenger compart-
ment as quickly as possible, by taking the
greatest advantage from the system po-
tential.
The function uses the maximum temper-
ature of the heating fluid, whereas air dis-
tribution to feet and 5
thfan speed.
With the function switched on, however,
all the manual settings can be made.
To switch the function off, you only need
to turn the ring of a knob (1) or (6) of the
temperature set to a value lower than
32.5°C; the opposite display will show
32.5°C.By pressing button (14)
AUTO
, the dis-
play indicates a temperature of 32.5°C and
falls within an operating condition with au-
tomatic temperature control.

GETTING TO KNOW YOUR CAR
122
LO function
(highest cooling power - fig. 104)
It is switched on by setting a temperature
lower than 16.5°C on the display; this set-
ting is shown by both displays.
This function can be switched on when you
wish to cool the passenger compartment as
quickly as possible, by taking the greatest
advantage from the system potential.
The function cuts off air heating, switches
on both internal air recirculation (to prevent
hot air from entering the compartment) and
the climate control compressor, brings air
distribution to E
and 5
thfan speed.
With the function switched on, however,
all the manual settings can be made.
To switch the function off, you only need
to turn the ring of a knob (1) or (6) of the
temperature set to a value greater than
16.5°C; the opposite display will show
16.5°C.
fig. 104
A0B0065m
By pressing button (14)
AUTO
the display
indicates a temperature of 16.5°C and falls
within an operating condition with automatic
temperature control.

GETTING TO KNOW YOUR CAR
126
AIR DISTRIBUTION SELECTION
BUTTON
(fig. 108)
By pressing button MODE(8) repeat-
edly, you can manually choose one of the
five possible modes for air distribution:
E
Flow of air to the dashboard centre
and side outlets and rear outlets.
ZE
Splitting of the air flow between the
vents to the lower part of the pas-
senger compartment (warmest air)
and the dashboard centre and side
outlets and the rear outlet (coolest
air). This air flow distribution is par-
ticularly useful in spring and autumn,
when the sun is shining.
Z
Air flow towards the front and rear
lower part of the passenger compart-
ment. Due to the natural tendency of
heat to spread upwards, this type of
distribution allows heating of the pas-
senger compartment in the shortest
time, also giving a prompt feeling of
warmth to the coldest parts of the
body.
Q
Splitting of the air flow between the
windscreen and side window defrost-
ing/demisting vents and the lower
part of the passenger compartment.
This type of air distribution allows sat-
isfactory heating of the passenger
compartment while preventing pos-
sible misting of the windows.
Q
Air flow to the windscreen and front
side window vents to demist or de-
frost them.
To resume automatic air distribution con-
trol after a manual selection, press button
(14) AUTO
.
fig. 108
A0B0069m
Z

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
A0B0075m

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.