| Removal | 
| 1. | 
 Disconnect the negative (-) battery terminal.  | 
| 2. | 
 Remove the heater and A/C control unit. 
(Refer to Heating, Ventilation and Air Conditioning - "Controller") 
  | 
| 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
Air Ventilation Seat Components and Components LocationHyundai Sonata LF 2014-2019 Service Manual: Compressor Description and Operation
   Description
The compressor is the power unit of the A/C system.
It is located on the side of engine block and driven by a V-belt of the engine.
The compressor changes low pressure and low temperature refrigerant gas into high pressure and high temperature refrigerant gas.
Variable Swash Plat ...
   
Hyundai Sonata LF 2014-2019 Service Manual: Front Pillar Trim Components and Components Location
   Component Location
1. Front pillar trim
 ...