CITROËN C4 Handbook page 96

Ease of use and comfort
4. Air intake / Air recirculation
The intake of exterior air prevents the formation
of mist on the windscreen and side windows.
The recirculation of interior air isolates the
passenger compartment from exterior odours
and smoke.
This function allows hot or cold air to be
delivered selectively and more quickly.
Return to exterior air intake as soon as possible
to prevent deterioration of the the air quality
and the formation of mist.
F Press the button to recirculate
the interior air. The indicator
lamp comes on to confirm this.
F Press the button again to permit the intake
of exterior air. The indicator lamp goes off
to confirm this.
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5. Air conditioning On / Off
The air conditioning is designed to
operate effectively in all seasons,
with the windows closed.
It enables you to:
- lower the temperature, in summer,
- increase the effectiveness of the demisting
in winter, above 3 °C.
Switching on
F Press the "A/C" button, the button's
indicator lamp comes on.
The air conditioning does not operate
when the air flow adjustment control 2
is in position "0".
To obtain cooled air more quickly, you
can use recirculation of interior air for a
few moments. Then return to fresh air
intake.
Switching off
F Press the "A/C" button again, the button's
indicator lamp goes off.
Switching off may affect comfort levels
(humidity, condensation).