CITROEN C4 Handbook page 56

Ease of use and comfort
Automatic Comfort
programme
This automatic mode ensures optimum
management of the passenger compartment
temperature, air flow and air distribution, based
on the selected comfort level.
► Press knob 3 on the central controls or button
10 on the touch screen to activate/deactivate the
air conditioning system's automatic mode.
The indicator lamp in the button lights up
when the air conditioning system is operating
automatically.
You can adjust the intensity of the
automatic Comfort programme by using the
"OPTIONS" button to select one of the available
settings:
– "Soft": provides soft and quiet operation by
limiting air flow.
– "Normal": offers the best compromise
between a comfortable temperature and quiet
operation (default setting).
– "Fast": provides strong and effective air flow.
To change the current setting (shown by the
corresponding indicator lamp), press button 14
repeatedly until the desired setting is displayed.
To ensure passenger comfort in the rear seats,
favour "Normal" and "Fast" settings.
This setting is associated with automatic mode
only. However, on deactivation of AUTO mode,
the indicator lamp for the most recently selected
setting remains on.
54
Changing the setting does not reactivate AUTO
mode if it was deactivated.
In cold weather with the engine cold, the
air flow is increased gradually until the
comfort setting has been reached, in order to
limit the delivery of cold air into the passenger
compartment.
On entering the vehicle, if the interior
temperature is much colder or warmer than
the comfort setting requested, there is no
need to alter the value displayed to more
quickly reach the required level of comfort.
The system automatically corrects the
temperature difference as quickly as possible.
Manual control
It is possible to manually adjust one or more
of these functions, while the system retains
automatic control of the other functions:
– air flow.
– air distribution.
The indicator lamp in the "AUTO" button goes
out if a setting is changed.
► Press knob 3 or button 10 of the touch
screen again to reactivate the automatic Comfort
programme.
Adjusting the air flow
► Turn the knob 3 or press one of the buttons
3 on the touch screen to increase or decrease
the air flow.
The air flow symbol (a fan) is filled in according
to the request.
When the air flow is reduced to a minimum,
ventilation stops.
"OFF" is displayed alongside the fan.
Adjusting the air distribution
► Press the buttons 8 on the touch screen
to adjust the air flow distribution inside the
passenger compartment.
Windscreen and side windows
Central and side air vents
Footwells
The lighting of the button indicates that air is
being blown in the specified direction.
It is possible to activate the following buttons
simultaneously:
– Central and side air vents + footwells
– Windscreen and side windows + footwells
Air conditioning on/off
The air conditioning system is designed to
operate effectively in all seasons, with the
windows closed.
It is used to:
– lower the temperature in summer,
– increase the effectiveness of demisting in
winter, above 3°C.
► Press knob 1 or button 9 on the touch screen
to activate/deactivate the air conditioning.