2011 Seat Leon 5D window

146Air conditioning
Air distribution
Control 4
for setting the flow of air in the required direction.
 – Air distribution towards the windscreen. If the windscreen air output is
on and the air recirculation mode is pressed, this remains active. When the
recirculation mode is on, if the air distribution towards the windscreen
mode is selected, the recirculation mode is deactivated. For safety reasons,
the air recirculation mode should not be connected.
 – Air distribution to the upper body
 – Air distribution to footwell
 – Air distribution to the windscreen and the footwell
Blower
The air flow can be set at four speeds with the control 5
. The air flow
should always be set at the lowest speed when driving slowly.
WARNING
● For road safety all windows must be clear of ice, snow, and condensa-
tion. This is essential to ensure good visibility. Please familiarise your-
self with the correct operation of the heating and ventilation system, in-
cluding the anti-fog/defrost functions for the windscreens.
● In air recirculation mode, no cold air from the outside enters the vehi-
cle interior. The windows can quickly fog over if the heating is switched
off. Therefore, never leave the air recirculation mode switched on for a
long time (risk of accident).
Note
Please observe the general notes ⇒ page 155. 

147
Air conditioning
Climatic* Controls
Fig. 107 On the dash panel: Climatic controls
The climatic or semi-automatic air conditioning system only works
when the engine is running and the blower is switched on.
– Use the knobs ⇒ fig. 107 1
and 5 and control 6 to set the
temperature, air distribution and blower speed.
– To switch a function on or off, press the appropriate button 2
,
3 or 4. When the function is activated, the display window in
the lower corner of the button is lit.
Temperature selector ⇒  page 148
AC
button – Heating, ventilation and air-conditioning system on/off
⇒  page 148
12
 button – Heated rear window The heating will be switched off auto-
matically approximately 20 minutes after switching on. It can also be
switched off beforehand by pushing the button.
Button 
– Air recirculation mode ⇒ page 149
Air distribution control ⇒ page 148
Blower switch. There are four speed settings for the air flow. The air
flow should always be set at the lowest speed when driving slowly.
WARNING
For road safety all windows must be clear of ice, snow, and condensation.
This is essential to ensure good visibility. Please familiarise yourself with
the correct operation of the heating and ventilation system, including the
anti-fog/defrost functions for the windscreens. 
3
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149
Air conditioning
Heating
Maximum heat output, which is needed to defrost the windows quickly, is
only available when the engine has reached its operating temperature.
Air conditioner
When the air conditioning system is switched on, not only the temperature,
but also the air humidity in the vehicle interior is reduced. This improves
comfort for the vehicle occupants and prevents misting of the windows
when the ambient air humidity is high.
If the air conditioning system cannot be switched on this may be caused by
the following reasons: ●
The engine is not running.
● The blower is switched off.
● The outside temperature is below +3°C.
● The air conditioning system compressor has been temporarily switched
off because the engine coolant temperature is too high.
● The air conditioner fuse is faulty.
● Another fault in the vehicle. Have the air conditioner checked by a speci-
alised workshop. 
Air recirculation mode 
Air recirculation mode prevents fumes or unpleasant smells from coming from the outside.
Fig. 109 On the dash panel: Climatic controls

Safety FirstOperating InstructionsPractical TipsTechnical Specifications

150Air conditioning
Air recirculation mode ⇒ fig. 109 
prevents strong odours in the outside
air from entering the vehicle interior, for example when passing through a
tunnel or in queuing traffic.
With low temperatures outside, the air recirculation increases the effective-
ness of the heating system by warming the air inside the vehicle rather than
the cold air from outside.
With high outside temperatures, the air recirculation increases the effective-
ness of the air conditioning system by cooling the air inside the vehicle
rather than the ambient air.
If the windscreen air output is on and the air recirculation mode is pressed,
this remains active. When the recirculation mode is on, if the air distribution towards the windscreen mode is selected, the recirculation mode is deacti-
vated. For safety reasons, the air recirculation mode should not be connec-
ted.
WARNING
In air recirculation mode, no cold air from the outside enters the vehicle
interior. If the air conditioning system is switched off, the windows can
quickly mist over. Therefore, never leave the air recirculation mode
switched on for a long time (risk of accident).


151
Air conditioning
2C-Climatronic*
Controls
The controls allow separate adjustment of air conditioner settings for the left and right.
Fig. 110 On the dash panel: 2C Climatronic controls
The air conditioner controls the temperature when the engine is
running and the blower is switched on.
– Turn the temperature control knobs ⇒ fig. 110 to adjust the
temperature on the left hand side or the right hand side respec-
tively.
– The functions will be switched on when its buttons are pressed.
When these functions are activated, they are indicated on the
radio display. In addition, all these functions are lit with LEDs.
Press the button again to switch off the function.
The temperature can be adjusted separately for the left and right sides of
the vehicle interior. Button

– defrost function for the windscreen. The air drawn in from
outside the vehicle is directed at the windscreen. The air recirculation
mode, if switched on, will be switched off as soon as the defrost func-
tion is switched on. At temperatures over 3°C, the air conditioning sys-
tem will be switched on automatically in order to dehumidify the air.
The button is lit in yellow and the symbol appears on the radio or navi-
gator display.

button – Upward air distribution
 button – Central air distribution
 button – Downward air distribution
 button – Manual air recirculation mode
 button – Heated rear window The heating will be switched off auto-
matically approximately 20 minutes after switching on. However, it may 
1
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152Air conditioning
be turned off by pushing the button. The button lights up yellow and
the symbol appears in the display.AUTO
button – Automatic temperature, ventilation and air distribution
control ⇒ page 153
DUAL
button - Dual zone synchroniser
OFF button – Switches the 2C-Climatronic on and off ⇒ page 154
Blower control ⇒ page 154
AC
button – Switches heating, ventilation and air-conditioning system
on
WARNING
For road safety all windows must be clear of ice, snow, and condensation.
This is essential to ensure good visibility. Please familiarise yourself with
the correct operation of the heating and ventilation system, including the
anti-fog/defrost functions for the windscreens.
Note
Please observe the general notes ⇒ page 155. 
7
891011
Viewing Climatronic information
Information about the Climatronic system can be displayed
on the radio or radio and navigation screen mounted at fac-
tory.
Fig. 111 Navigation dis-
play with information
about the Climatronic
Fig. 112 Radio display
with information about
Climatronic


155
Air conditioning
When the AC
button is off (LED off), the air conditioning system is off.
When the AC
button is off, the air conditioning system is switched off to
save fuel. The temperature continues to self-regulate. The set temperature
can then only be reached if it is higher than the outside temperature.
Driver and passenger temperature control
The DUAL
button controls the synchronisation of the 2 Climatronic climate
zones.
When the DUAL
button is on (LED lit), the climate zone of the Climatronic is
personalised, for example: Driver side temperature 22°C and passenger
side temperature 23°C.
When the DUAL
button is off (LED off), the climate zone of the Climatronic is
synchronised, for example: Driver side temperature 22°C and passenger
side temperature 22°C.
If the DUAL
button is off and the passenger side temperature is changed,
the function is automatically activated. 
Air recirculation mode
Air recirculation mode prevents fumes or unpleasant smells
from coming from the outside. – Press the button 
⇒ fig. 113
2 to switch air recirculation
mode on or off. It is switched on if the following symbol appears
in the display .
Air recirculation mode prevents strong odours in the ambient air from enter-
ing the vehicle interior, for example when passing through a tunnel or in a
traffic jam. With low outside temperatures, the air recirculation increases the effective-
ness of the heating system by heating the air inside the vehicle rather than
the air from outside.
With high outside temperatures, the air recirculation increases the effective-
ness of the air conditioning system by cooling the air inside the vehicle
rather than the ambient air.
If the windscreen air output is on and the air recirculation mode is pressed,
this remains active. When the recirculation mode is on, if the air distribution
towards the windscreen mode is selected, the recirculation mode is deacti-
vated. For safety reasons, the air recirculation mode should not be connec-
ted.
WARNING
In air recirculation mode, no cold air from the outside enters the vehicle
interior. If the air conditioning system is switched off, the windows can
quickly mist over. Therefore, never leave the air recirculation mode
switched on for a long time (risk of accident).

General notes
Pollution filter
The pollution filter (a combined particulate filter and active carbon filter)
serves as a barrier against impurities in the outside air, including dust and
pollen.
For the air conditioner to work with maximum efficiency, the pollution filter
must be replaced at the intervals specified in the Service Schedule.
If the filter loses efficiency prematurely due to use in areas reaching very
high pollution levels, the pollen filter must be changed more frequently
than stated in the Service Schedule. 
Safety FirstOperating InstructionsPractical TipsTechnical Specifications

156Air conditioning
Air conditioner
When the air conditioning system is switched on, not only the temperature,
but also the air humidity in the vehicle interior is reduced. This improves
comfort for the vehicle occupants and prevents misting of the windows
when the ambient air humidity is high.
If the air conditioning system cannot be switched on this may be caused by
the following reasons:
● The engine is not running.
● The AC
button is disconnected.
● The outside temperature is below +3°C.
● The air conditioning system compressor has been temporarily switched
off because the engine coolant temperature is too high.
● The air conditioner fuse is faulty.
● Another fault in the vehicle. Have the air conditioner checked by a speci-
alised workshop.
CAUTION
● If you suspect that the air conditioner is damaged, switch it off with but-
ton AC
to prevent further damage and have it checked by a specialised
workshop.
● Repairs to the air conditioner require specialist knowledge and special
tools. Therefore, we recommend you to take the vehicle to a specialised
workshop.
Note
● If the humidity and temperature outside the vehicle are high, condensa-
tion can drip off the evaporator in the cooling system and so forming a pud-
dle underneath the vehicle. This is completely normal and there is no need
to suspect a leak.
● Keep the air intake slots in front of the windscreen free of snow, ice and
leaves to ensure heating and cooling are not impaired, and to prevent the
windows from misting over. ●
The air from the vents flows through the vehicle interior and is extracted
by slots designed for this purpose. Therefore, do not cover these slots with
items of clothing or other objects.
● The air conditioner operates most effectively with the windows and the
sliding/tilting sunroof* closed. However, if the temperature inside the vehi-
cle is excessive because of the sun, the air inside can be cooled faster by
opening the windows for a short time.
● Do not smoke while air recirculation mode is on, as smoke drawn into
the air conditioning system leaves a residue on the evaporator, producing a
permanent unpleasant odour.
● It is advisable to connect the air conditioning at least once a month, to
lubricate the system gaskets and prevent leaks. If a decrease in the cooling
capacity is detected, an Authorised Service Centre should be consulted to
check the system. 