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 Owners Manual: Start-up
You can start the engine without inserting the key. NOTICE To prevent damaging the smart key: Keep the smart key away from water or any liquid and fire. If the inside of the smart key gets damp (due to drinks or moisture), or is heated, internal circuit may malfunction, excluding the car from ...

Hyundai Sonata LF 2014-2019 Owners Manual: Manual Heating and Air Conditioning
The heating and cooling system can be controlled manually by pushing buttons other than the AUTO button. In this case, the system works sequentially according to the order of buttons selected. When pressing any button except the AUTO button while using automatic operation, the functions not selec ...

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