Hyundai Sonata: Heating and Air Conditioning / Temperature control

The temperature will increase by turning the knob to the right.

The temperature will decrease by turning the knob to the left.

Instrument panel vents
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. ...

Air intake control
This button is used to select the outside (fresh) air position or recirculated air position. Recirculated air position The indicator light on the button illuminates when the recirculated air positi ...

Other information:

Hyundai Sonata LF 2014-2019 Service Manual: Ambient Temperature Sensor (ATS) Description and Operation
Description Ambient Temperature Sensor (ATS) is installed on the front-end module and senses the ambient temperature. ECM receives not only the intake air temperatue but also the ambient air temperature informations at the same time to control the intake air quantity precisely provided th ...

Hyundai Sonata LF 2014-2019 Service Manual: Curtain Airbag (CAB) Module Repair procedures
Removal 1. Disconnect the battery negative cable and wait for at least 3 minutes before beginning work. 2. Remove the roof trim. (Refer to Body - "Roof Trim Assembly") 3. Disconnect the curtain airbag harness connector. 4. After loosening the mounting bolts and nuts remove the curta ...

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