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Home >> Hyundai >> 2023 >> Santa Fe SE, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 72 (Heater System) >> Heater Unit >> Replacement

Heater Unit: Replacement

WARNING: This page is about a different car, the 2022 Genesis GV70. However, it is still accessible from the selected car via links, so may be relevant.
  1. Disconnect the negative (-) battery terminal.
  2. Recover the refrigerant with a recovery/recycling/charging station.

    (Refer to Air Conditioning System - "REFRIGERANT RECOVERY/RECYCLING/CHARGING/VACUUM ")

  3. When the engine is cool, drain the engine coolant from the radiator.

    (Refer to Engine Mechanical System - "COOLANT ")[G 2.5 T-GDI Specification]

    (Refer to Engine Mechanical System - "COOLANT ")[G 3.5 T-GDI Specification]

  4. Remove the cowl top cover.

    (Refer to Body (Interior and Exterior) - "COWL TOP COVER ")

  5. Loosen the mounting bolts and separate the expansion valve (A) from the evaporator core.

    Tightening torque: 

    8.8 - 13.7 N.m (0.9 - 1.4 kgf.m, 6.5 - 10.1 lb-ft)

    G14765132Courtesy of HYUNDAI MOTOR AMERICA
  6. Separate the heater hose (A).
    G14765133Courtesy of HYUNDAI MOTOR AMERICA
  7. Loosen the cowl cross bar assembly mounting bolts (A).

    Tightening torque: 

    16.7 - 25.5 N.m (1.7 - 2.6 kgf.m, 12.3 - 18.8 lb-ft)

    G14765134Courtesy of HYUNDAI MOTOR AMERICA
  8. Remove the front seat assembly.

    (Refer to Body (Interior and Exterior) - "FRONT SEAT ASSEMBLY ")

  9. Remove the floor console assembly.

    (Refer to Body (Interior and Exterior) - "FLOOR CONSOLE ASSEMBLY ")

  10. Remove the front pillar trim.

    (Refer to Body (Interior and Exterior) - "FRONT PILLAR TRIM ")

  11. Remove the cowl side trim.

    (Refer to Body (Interior and Exterior) - "COWL SIDE TRIM ")

  12. Remove the crash pad lower panel.

    (Refer to Body (Interior and Exterior) - "CRASH PAD LOWER PANEL ")

  13. Remove the steering column shroud lower panel.

    (Refer to Body (Interior and Exterior) - "STEERING COLUMN SHROUD PANEL ")

  14. Remove the steering wheel.

    (Refer to Steering System - "STEERING WHEEL ")

  15. Remove the multifunction switch.

    (Refer to Body Electrical System - "MULTIFUNCTION SWITCH ")

  16. Lower the steering column after loosening the mounting bolts.

    (Refer to Steering System - "STEERING COLUMN & SHAFT ")

  17. Remove the accelerator pedal.

    (Refer to Engine Control/Fuel System - "ACCELERATOR POSITION SENSOR (APS) ")

  18. Remove the rear air duct (B) and separate the floor carpet (A).
    G14765135Courtesy of HYUNDAI MOTOR AMERICA
  19. Remove the rear heating duct (A).
    G14765136Courtesy of HYUNDAI MOTOR AMERICA
  20. Loosen the mounting nut, remove the floor console duct (A).
    G14765137Courtesy of HYUNDAI MOTOR AMERICA
  21. Disconnect the SRSCM connector (A).
    G14765138Courtesy of HYUNDAI MOTOR AMERICA
  22. Disconnect the junction box connectors (A).
    G14765139Courtesy of HYUNDAI MOTOR AMERICA
  23. Disconnect the multi box connectors (A).

    [LH] 

    G14765140Courtesy of HYUNDAI MOTOR AMERICA

    [RH] 

    G14765141Courtesy of HYUNDAI MOTOR AMERICA
  24. Disconnect the connectors (A) and the mounting clips in the front pillar.

    [LH] 

    G14765142Courtesy of HYUNDAI MOTOR AMERICA

    [RH] 

    G14765143Courtesy of HYUNDAI MOTOR AMERICA
  25. Separate the drain hose (A).
    G14765144Courtesy of HYUNDAI MOTOR AMERICA
  26. Remove the lower mounting bolt of the blower unit.

    Tightening torque: 

    3.9 - 5.9 N.m (0.4 - 0.6 kgf.m, 2.9 - 4.3 lb-ft)

    [LH] 

    G14765145Courtesy of HYUNDAI MOTOR AMERICA

    [RH] 

    G14765146Courtesy of HYUNDAI MOTOR AMERICA
  27. After loosening the bolts and nuts remove the crash pad and heater & blower unit assembly (A) together.
    G14765147Courtesy of HYUNDAI MOTOR AMERICA
  28. Remove the IBU.

    (Refer to Engine Electrical System - "INTEGRATED BODY CONTROL UNIT (IBU) ")

  29. Remove the heater control unit.

    (Refer to Controller - "HEATER CONTROL UNIT ")

  30. Remove the shower duct.

    [LH] 

    1. Loosen the mounting screw, remove the shower duct (A).
      G14765148Courtesy of HYUNDAI MOTOR AMERICA

    [RH] 

    1. Loosen the mounting screw, remove the shower duct (A).
      G14765149Courtesy of HYUNDAI MOTOR AMERICA
  31. Disconnect the heater and blower unit connectors.
    1. Disconnect the smart key antenna connector (A).
      G14765150Courtesy of HYUNDAI MOTOR AMERICA
    2. Disconnect the joint connector (A).
      G14765151Courtesy of HYUNDAI MOTOR AMERICA
    3. Disconnect the console temperature control actuator connector (A) and console ON/OFF actuator connector (B).
      G14765152Courtesy of HYUNDAI MOTOR AMERICA
    4. Disconnect the evaporator temperature sensor connector (A).
      G14765153Courtesy of HYUNDAI MOTOR AMERICA
    5. Disconnect the console mode control actuator connector (A).
      G14765154Courtesy of HYUNDAI MOTOR AMERICA
    6. Disconnect the passenger temperature control actuator connector (A) and console temperature control actuator A connector (B).
      G14765155Courtesy of HYUNDAI MOTOR AMERICA
    7. Disconnect the power mosfet connector (A) and heater control unit connector (B).
      G14765156Courtesy of HYUNDAI MOTOR AMERICA
    8. Disconnect the passenger mode control actuator connector (A).
      G14765157Courtesy of HYUNDAI MOTOR AMERICA
    9. Disconnect the intake actuator connector (A).
      G14765158Courtesy of HYUNDAI MOTOR AMERICA
    10. Disconnect the blower motor connector (A).
      G14765159Courtesy of HYUNDAI MOTOR AMERICA
  32. Disconnect the PTC heater connector (A).[D 2.2 TCI Specification]
    G14765160Courtesy of HYUNDAI MOTOR AMERICA
  33. Loosen the heater & blower unit mounting bolt (A).

    Tightening torque: 

    3.9 - 5.9 N.m (0.4 - 0.6 kgf.m, 2.9 - 4.3 lb-ft)

    G14765161Courtesy of HYUNDAI MOTOR AMERICA
  34. Loosen the mounting nuts and remove the heater & blower unit (A) from the crash pad.

    Tightening torque: 

    3.9 - 5.9 N.m (0.4 - 0.6 kgf.m, 2.9 - 4.3 lb-ft)

    G14765162Courtesy of HYUNDAI MOTOR AMERICA
  35. Loosen the mounting screw and separate the heater unit (A).

    Tightening torque: 

    3.9 - 5.9 N.m (0.4 - 0.6 kgf.m, 2.9 - 4.3 lb-ft)

    G14765163Courtesy of HYUNDAI MOTOR AMERICA
    G14765164Courtesy of HYUNDAI MOTOR AMERICA
  36. Install in the reverse order of removal.

    Information 

    • Make sure that each of the assembly components operates properly.
    • Replace any damaged clips (or pin-type retainers).
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