Hyundai Elantra 2019 Owner's Manual page 211

Fan speed control
The fan speed can be set to the
desired speed by turning the fan
speed control knob.
More air is delivered with higher fan
speeds.
Pressing the OFF button turns off the
fan.
NOTICE
Operating the fan speed when the
ignition switch is in the ON posi-
tion could cause the battery to
discharge. Operate the fan speed
when the engine is running.
Air conditioning
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Push the A/C button to manually turn
the air conditioning system on (indi-
cator light will illuminate).
Push the button again to turn the air
conditioning system off.
OFF mode
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Push the OFF button of the front to
turn off the air climate control system.
However, you can still operate the
mode and air intake buttons as long
as the ignition switch is in the ON
position.
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