Hyundai Sonata Hybrid 2021 Owner's Manual page 236

Fan speed control
The fan speed can be set to the desired
speed by using the fan speed control
toggle switch.
More air is delivered with higher fan
speeds.
Pressing the OFF button turns off the fan.
Information
For better sound quality, fan speed may
automatically slow down for a couple
of minutes when you activate voice
recognition or hands free.
NOTICE
Operating the fan when the ignition
switch is in the ON position could cause
the battery to discharge. Operate the
fan when the engine is running.
Driver Only
ODN8H059319
If you press the DRIVER ONLY button
(
air mostly blows in the direction of the
driver's seat.
However, some of the air may come out
of other seating position ducts to keep
indoor air pleasant.
If you use the button with no passenger
in the front passenger seat, energy
consumption will be reduced.
DRIVER ONLY button will be turned off
under the following conditions:
(1) Defrost on (the DRIVER ONLY button
indicator is not turned off)
(2) SYNC on
(3) Adjusted front passenger seat
temperature
(4) DRIVER ONLY button re-push
)and the indicator light illuminates,
05
ODN8H050105N
5-95