Hyundai Sonata: Seat Electrical / Seat Heater Switch Repair procedures

Removal
[Front Seat]
1.
Disconnect the negative (-) battery terminal.
2.
Remove the heater and A/C control unit.
(Refer to Heating, Ventilation and Air Conditioning - "Controller")

[Rear Seat]
1.
Disconnect the negative (-) battery terminal.
2.
Remove the rear door window switch.
(Refer to Power Windows - "Power Window Switch")
Seat Heater Switch Schematic Diagrams
Circuit Diagram ...

Air Ventilation Seat Components and Components Location
Component Location ...

Other information:

Hyundai Sonata LF 2014-2019 Service Manual: Description and Operation
Description It's a system that uses illumination sensor to automatically turn ON the tail lamp and head lamp based on the change in surrounding environment's illumination condition. It activates when the vehicle enters/exits tunnel, or when the illumination condition in surrounding enviro ...

Hyundai Sonata LF 2014-2019 Service Manual: Rear Seat Back Cover Components and Components Location
Component Location 1. Rear seat back cover [LH]2. Rear seat back cover [RH] ...

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