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Home >> Genesis >> 2019 >> G90 5.0 Ultimate, AWD >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Heater System >> Heater Unit >> Repair Procedures >> Replacement

Repair Procedures: Replacement

CAUTION: When prying with a flat-tip screwdriver or use a prying trim tool, wrap it with protective tape, and apply protective tape around the related parts, to prevent damage.
  1. Disconnect the negative (-) battery terminal.
  2. Recover the refrigerant with a recovery/recycling/charging station.
  3. When the engine is cool, drain the engine coolant from the radiator.

    (Refer to Engine Mechanical System - "COOLANT ")

  4. Remove the cowl top cover.

    (Refer to Body - "COWL TOP COVER ")

  5. Remove the bolts and the expansion valve (A) from the evaporator core.

    Tightening Torque: 

    3.9 - 5.9 N.m (0.8 - 1.2 kgf.m, 5.8 - 8.7 Ib-ft)

    G12719592Courtesy of HYUNDAI MOTOR AMERICA
    NOTE:
    • Plug or cap the lines immediately after disconnecting them to avoid moisture and dust contamination.
    • When installing, replace with a new O-ring.
  6. Disconnect the heater hoses (A) from the heater unit.
    G12719593Courtesy of HYUNDAI MOTOR AMERICA
    CAUTION:
    • Engine coolant will run out when the hoses are disconnected; drain it into a clean drip pan. Be sure not to let coolant spill on electrical parts or painted surfaces. If any coolant spills, rinse it off immediately.
  7. Loosen the cowl cross member mounting bolts.
    G12719594Courtesy of HYUNDAI MOTOR AMERICA
  8. Remove the floor console assembly.

    (Refer to Body - "FLOOR CONSOLE ASSEMBLY ")

  9. Remove the crash pad lower panel.

    (Refer to Body - "CRASH PAD LOWER PANEL ")

  10. Remove the front pillar trim.

    (Refer to Body - "FRONT PILLAR TRIM ")

  11. Remove the cowl side trim.

    (Refer to Body - "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 - "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 AND SHAFT ")

  17. Remove the crash pad under cover [RH](A).
    G12719595Courtesy of HYUNDAI MOTOR AMERICA
  18. Disconnect the under lamp connector (A) CO2 sensor connector (B).
    G12719596Courtesy of HYUNDAI MOTOR AMERICA
  19. Remove the front air duct (A) after loosening the mounting nut.
    G12719597Courtesy of HYUNDAI MOTOR AMERICA
  20. Disconnect the airbag control module (SRSCM) connector (A).
    G12719598Courtesy of HYUNDAI MOTOR AMERICA
  21. Disconnect the junction box connectors (A).
    G12719599Courtesy of HYUNDAI MOTOR AMERICA
  22. Disconnect the multi box connectors (A).

    [Driver's side] 

    G12719600Courtesy of HYUNDAI MOTOR AMERICA

    [Passenger's side] 

    G12719601Courtesy of HYUNDAI MOTOR AMERICA
  23. Disconnect the connectors (A) and the mounting clips in the front pillar.

    [Driver's side] 

    G12719602Courtesy of HYUNDAI MOTOR AMERICA

    [Passenger's side] 

    G12719603Courtesy of HYUNDAI MOTOR AMERICA
  24. Remove the drain hose (A).
    G12719604Courtesy of HYUNDAI MOTOR AMERICA
  25. Loosen the blower unit mounting bolts.

    Tightening Torque: 

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

    [Driver's Side] 

    G12719605Courtesy of HYUNDAI MOTOR AMERICA

    [Passenger's Side] 

    G12719606Courtesy of HYUNDAI MOTOR AMERICA
  26. After loosening the bolts and nuts remove the main crash pad and cowl cross bar assembly (A) together.
    G12719607Courtesy of HYUNDAI MOTOR AMERICA
  27. Disconnect the heater & blower unit connectors.

    [Driver's Side] 

    1. Disconnect the auto defogging actuator connector (A), mode control actuator connector (B) and remove the wiring mounting clips.
      G12719608Courtesy of HYUNDAI MOTOR AMERICA
    2. Disconnect the temperature control actuator connector (A), evaporator temperature sensor connector (B), console temperature actuator connector (C) and remove the wiring mounting clips.
      G12719609Courtesy of HYUNDAI MOTOR AMERICA
    3. Disconnect the console mode control actuator (A), console ON/OFF control actuator (B) and remove the wiring mounting clips.
      G12719610Courtesy of HYUNDAI MOTOR AMERICA

    [Passenger's Side] 

    1. Disconnect the intake actuator connector (A), cluster ionizer connector (B), air flow actuator connector (C) and remove the wiring mounting clips.
      G12719611Courtesy of HYUNDAI MOTOR AMERICA
    2. Disconnect the mode control actuator connector (A), temperature control actuator connector (B), heater control unit connector (C) and remove the wiring mounting clips.
      G12719612Courtesy of HYUNDAI MOTOR AMERICA
    3. Disconnect the power mosfet connector (A), evaporator temperature sensor connector (B) and remove the wiring mounting clips.
      G12719613Courtesy of HYUNDAI MOTOR AMERICA
    4. Disconnect the blower motor connector (A) and remove the wiring mounting clips.
      G12719614Courtesy of HYUNDAI MOTOR AMERICA
  28. Loosen the heater & blower unit mounting bolt (A).

    Tightening Torque: 

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

    G12719615Courtesy of HYUNDAI MOTOR AMERICA
  29. Remove the heater and blower unit (A) from the crash pad after loosening the mounting nuts.

    Tightening Torque: 

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

    G12719616Courtesy of HYUNDAI MOTOR AMERICA
  30. Separate the blower unit (B) from the heater unit (A) after loosening the screws.
    G12719617Courtesy of HYUNDAI MOTOR AMERICA
    G12719618Courtesy of HYUNDAI MOTOR AMERICA
  31. To install, reverse the removal procedure.
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