Honda Civic 2019 Manual page 208

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Switching between the recirculation and fresh air modes
Models without fresh air button
Press the (recirculation) button and switch the mode depending on
environmental conditions.
Recirculation mode (indicator on): Recirculates air from the vehicle's interior through
the system.
Fresh air mode (indicator off): Maintains outside ventilation. Keep the system in
fresh air mode in normal situations.
Models with fresh air button
Press the (recirculation) or
depending on environmental conditions.
Recirculation mode (indicator on): Recirculates air from the vehicle's interior
through the system.
Fresh air mode (indicator on): Maintains outside ventilation. Keep the system
in fresh air mode in normal situations.
(fresh air) button to switch the mode
uuClimate Control System
Continued
* uUsing Automatic Climate Control
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