CITROËN C4 Picasso Owner's Handbook Manual page 107

Dual-zone manual air conditioning with temperature regulation
The air conditioning system operates with the
engine running.
The temperature at the nozzles and vents
is regulated by the system according to the
temperature in the passenger compartment
and the temperature setting.
Press the button for the " Air conditioning"
menu to display the system controls page.
Temperature adjustment
The driver and front passenger can each adjust
the temperature.
Press one of these buttons to
reduce (blue) or increase (red)
the value.
The value indicated corresponds to a level of
comfort and not to a temperature in degrees Celsius
or Fahrenheit (depending on the unit selected).
A setting of around 21 provides optimum
comfort. Depending on your requirements, a
setting between 18 and 24 is normal.
In addition, it is recommended that a difference
between left and right of more than 3 should be
avoided.
Air flow adjustment
Press one of these buttons to
increase or decrease the speed of
the air booster fan.
The air flow symbol (a fan) fills progressively
according to the quantity of air wanted.
By reducing the air flow to minimum, you are
stopping ventilation.
Avoid driving too long without ventilation
(risk of misting and deterioration of air
quality).
Comfort
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