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Home >> Kia >> 2017 >> Cadenza Technology >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Heater System >> Heater Unit >> Repair Procedures >> Replacement

Repair Procedures: Replacement

  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 expansion valve cover (A) after loosening the nut.

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

    Fig 1: Removing Expansion Valve Cover
    G12288464Courtesy of KIA MOTORS AMERICA, INC.
  6. Remove the expansion valve (A) from the evaporator core after loosening the bolts.

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

    Fig 2: Removing Expansion Valve
    G12288465Courtesy of KIA MOTORS AMERICA, INC.
    NOTE:
    • Plug or cap the lines immediately after disconnecting them to avoid moisture and dust contamination.
    • When installing, replace with a new O-ring (B).
  7. Disconnect the heater hoses (A).
    Fig 3: Locating Heater Hoses
    G12288466Courtesy of KIA MOTORS AMERICA, INC.
    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.
  8. Loosen the cowl cross member mounting bolts (A).
    Fig 4: Loosening Cowl Cross Member Mounting Bolts
    G12288467Courtesy of KIA MOTORS AMERICA, INC.
  9. Remove both sides of front seat assembly.

    (Refer to Body - "FRONT SEAT ASSEMBLY ")

  10. Remove the floor console.

    (Refer to Body - "FLOOR CONSOLE ")

  11. Remove both sides of the front pillar trim.

    (Refer to Body - "FRONT PILLAR TRIM ")

  12. Remove both sides of the cowl side trim.

    (Refer to Body - "COWL SIDE TRIM ")

  13. Remove the crash pad lower panel.

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

  14. Remove the steering column shroud lower panel.

    (Refer to Body - "STEERING COLUMN SHROUD PANEL ")

  15. Remove the steering wheel.

    (Refer to Steering System - "STEERING WHEEL ")

  16. Remove the multifunction switch.

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

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

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

  18. Remove the front door scuff trim.

    (Refer to Body - "DOOR SCUFF TRIM ")

  19. Separate the accelerator pedal (A) after loosening the bolts.

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

    Fig 5: Separating Accelerator Pedal
    G12288468Courtesy of KIA MOTORS AMERICA, INC.
  20. Remove the accelerator pedal after disconnecting the connector (A).
    Fig 6: Removing Accelerator Pedal
    G12288469Courtesy of KIA MOTORS AMERICA, INC.
  21. Separate the floor carpet (A) to allow space for removing the rear heating duct.

    [LH] 

    Fig 7: Separating Floor Carpet - LH
    G12288470Courtesy of KIA MOTORS AMERICA, INC.

    [RH] 

    Fig 8: Separating Floor Carpet - RH
    G12288471Courtesy of KIA MOTORS AMERICA, INC.
  22. Remove the rear heating duct (A) after loosening the clip.

    [LH] 

    Fig 9: Removing Rear Heating Duct - LH
    G12288472Courtesy of KIA MOTORS AMERICA, INC.

    [RH] 

    Fig 10: Removing Rear Heating Duct - RH
    G12288473Courtesy of KIA MOTORS AMERICA, INC.
  23. Disconnect the shift lever connector (A).
    Fig 11: Disconnecting Shift Lever Connector
    G12288474Courtesy of KIA MOTORS AMERICA, INC.
  24. Remove the shift lever cable (B) in the direction of the arrow after removing the clip (A).
    Fig 12: Locating Shift Lever Cable (1 Of 2)
    G12288475Courtesy of KIA MOTORS AMERICA, INC.
    Fig 13: Locating Shift Lever Cable (2 Of 2)
    G12288476Courtesy of KIA MOTORS AMERICA, INC.
  25. Remove the shift lever assembly (A) after loosening the bolts.

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

    Fig 14: Removing Shift Lever Assembly Bolts
    G12288477Courtesy of KIA MOTORS AMERICA, INC.
  26. Disconnect the airbag control module (SRSCM) connector (A).
    Fig 15: Disconnecting Airbag Control Module (SRSCM) Connector
    G12288478Courtesy of KIA MOTORS AMERICA, INC.
  27. Disconnect the passenger compartment junction box connectors (A).
    Fig 16: Disconnecting Passenger Compartment Junction Box Connectors
    G12288479Courtesy of KIA MOTORS AMERICA, INC.
  28. Disconnect the multi box connectors (A).

    [LH] 

    Fig 17: Disconnecting Multi Box Connectors - LH
    G12288480Courtesy of KIA MOTORS AMERICA, INC.

    [RH] 

    Fig 18: Disconnecting Multi Box Connectors - RH
    G12288481Courtesy of KIA MOTORS AMERICA, INC.
  29. Disconnect the connector (A) and the mounting clips in the front pillar.

    [LH] 

    Fig 19: Disconnecting Connector And Mounting Clips In Front Pillar - LH
    G12288482Courtesy of KIA MOTORS AMERICA, INC.

    [RH] 

    Fig 20: Disconnecting Connector And Mounting Clips In Front Pillar - RH
    G12288483Courtesy of KIA MOTORS AMERICA, INC.
  30. Remove the drain hose (A).
    Fig 21: Removing Drain Hose
    G12288484Courtesy of KIA MOTORS AMERICA, INC.
  31. After loosening the nuts and bolts, remove the main crash pad and cowl cross bar assembly (A) altogether.

    [LH] 

    Fig 22: Removing Main Crash Pad And Cowl Cross Bar Assembly - LH
    G12288485Courtesy of KIA MOTORS AMERICA, INC.

    [RH] 

    Fig 23: Removing Main Crash Pad And Cowl Cross Bar Assembly - RH
    G12288486Courtesy of KIA MOTORS AMERICA, INC.
  32. Remove the body control module (BCM).

    (Refer to Body Electrical System - "BCM (BODY CONTROL MODULE) ")

  33. Remove the heater control unit.

    (Refer to Controller - "HEATER CONTROL UNIT ")

  34. Disconnect the heater & blower unit connectors.
    1. Remove the smart key unit (A) after loosening the screws.
      Fig 24: Removing Smart Key Unit Screws
      G12288487Courtesy of KIA MOTORS AMERICA, INC.
    2. Disconnect the temperature control actuator (A) and mode control actuator (B) connectors, and then remove the wiring mounting clips.
      Fig 25: Disconnecting Temperature Control Actuator
      G12288488Courtesy of KIA MOTORS AMERICA, INC.
    3. Disconnect the evaporator temperature sensor (A), temperature control actuator (B) and FET (C) connectors, and then remove the wiring mounting clips.
      Fig 26: Disconnecting Evaporator Temperature Sensor, Temperature Control Actuator
      G12288489Courtesy of KIA MOTORS AMERICA, INC.
    4. Disconnect the blower motor connector (A) and then remove the wiring mounting clips.
      Fig 27: Removing Wiring Mounting Clips
      G12288490Courtesy of KIA MOTORS AMERICA, INC.
    5. Remove the aspirator hose (A) after loosening the screw.
      Fig 28: Removing Aspirator Hose Screw
      G12288491Courtesy of KIA MOTORS AMERICA, INC.
    6. Disconnect the intake actuator connector (A) and then remove the wiring mounting clips.
      Fig 29: Disconnecting Intake Actuator Connector
      G12288492Courtesy of KIA MOTORS AMERICA, INC.
    7. Disconnect the PTC heater connector (A).
    Fig 30: Disconnecting PTC Heater Connector
    G12288493Courtesy of KIA MOTORS AMERICA, INC.
  35. Remove the heater and blower unit (A) from the crash pad after loosening the mounting nuts.
    Fig 31: Removing Heater And Blower Unit From Crash Pad
    G12288494Courtesy of KIA MOTORS AMERICA, INC.
  36. Separate the blower unit (B) from the heater unit (A) after loosening the screws.
    Fig 32: Separating Blower Unit From Heater Unit (1 Of 3)
    G12288495Courtesy of KIA MOTORS AMERICA, INC.
    Fig 33: Separating Blower Unit From Heater Unit (2 Of 3)
    G12288496Courtesy of KIA MOTORS AMERICA, INC.
    Fig 34: Separating Blower Unit From Heater Unit (3 Of 3)
    G12288497Courtesy of KIA MOTORS AMERICA, INC.
  37. Install in the reverse order of removal.
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