Honda 2017 Civic Owner's Manual page 213

uuClimate Control SystemuUsing Automatic Climate Control
■
Defrosting the Windshield and Windows
212
Pressing the (windshield defroster) button
turns the air conditioning system on and
automatically switches the system to fresh air
mode.
Press the button again to turn off, the
system returns to the previous settings.
1Defrosting the Windshield and Windows
For your safety, make sure you have a clear view
through all the windows before driving.
Do not set the temperature near the upper or lower
limit.
When cold air hits the windshield, the outside of the
windshield may fog up.
If the side windows fog up, adjust the vents so that
the air hits the side windows.