The outlet vents can be opened () or closed () separately using the thumbwheel.
Also, you can adjust the direction of air delivered from these vents using the vent control lever as shown.
Hyundai Sonata LF 2014-2019 Service Manual: AVN Keyboard Repair procedures
Removal
1.
Disconnect the negative (-) battery terminal.
2.
Using a screwdriver or remover, separate the center fascia panel (A).
3.
Remove the center fascia panel (A) after disconnect the connector.
4.
Remove the AVN keyboard unit (A) after loosening the screws.
Installation
1.
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Hyundai Sonata LF 2014-2019 Owners Manual: Instrument Panel Fuse Replacement
1. Turn the engine off.
2. Turn all other switches OFF.
3. Open the fuse panel cover.
4. Refer to the label on the inside of the fuse panel cover to locate the suspected
fuse location.
5. Pull the suspected fuse straight out. Use the removal tool provided in the
engine compartment fuses panel.
6 ...