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Home >> Hyundai >> 2014 >> Veloster Base, Standard Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 29 (Heater System) >> Heater Unit >> Repair Procedures >> Replacement
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Repair Procedures: Replacement

WARNING: This page is about a different car, the 2012 Hyundai Veloster. 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.
  3. When the engine is cool, drain the engine coolant from the radiator.
  4. Remove the expansion valve (A) from the evaporator core and then remove the cover (B).

    Tightening torque: 

    7.8 ~ 11.7 N.m (0.8 ~ 1.2 kgf.m, 5.7 ~ 8.6 lb-ft)

    Fig 1: Identifying Evaporator Core Expansion Valve And Cover
    G08811976Courtesy of HYUNDAI MOTOR AMERICA
    CAUTION: Plug or cap the lines immediately after disconnecting them to avoid moisture and dust contamination.
  5. Disconnect the inlet (A) and outlet (B) heater hoses from the heater unit and then remove the cover (C).
    Fig 2: Identifying Heater Unit Inlet And Outlet Heater Hoses, Cover
    G08811977Courtesy 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.
  6. Remove the center console.

    (Refer to "CENTER CONSOLE ")

  7. Remove the steering handle and column.

    (Refer to "STEERING COLUMN ")

  8. Remove the cowl top cover.

    (Refer to "COWL TOP COVER ")

  9. Remove the photo sensor.

    (Refer to - "Photo Sensor")

  10. Loosen the cowl cross member mounting bolts (A).
    Fig 3: Identifying Cowl Cross Member Mounting Bolts
    G08811978Courtesy of HYUNDAI MOTOR AMERICA
  11. Remove the left & right front filler trim and than disconnect the connectors (A).
    Fig 4: Identifying Left Front Filler Trim Connector
    G08811979Courtesy of HYUNDAI MOTOR AMERICA
    Fig 5: Identifying Right Front Filler Trim Connector
    G08811980Courtesy of HYUNDAI MOTOR AMERICA
  12. Disconnect the left & right multi box connectors (A).
    Fig 6: Identifying Left Multi Box Connector
    G08811981Courtesy of HYUNDAI MOTOR AMERICA
    Fig 7: Identifying Right Multi Box Connector
    G08811982Courtesy of HYUNDAI MOTOR AMERICA
  13. Disconnect the main fuse box connectors (A).
    Fig 8: Identifying Main Fuse Box Connectors
    G08811983Courtesy of HYUNDAI MOTOR AMERICA
  14. Disconnect the air bag connectors (A).
    Fig 9: Identifying Air Bag Connectors
    G08811984Courtesy of HYUNDAI MOTOR AMERICA
  15. Remove the center fascia panel (A).
    Fig 10: Identifying Center Fascia Panel
    G08811985Courtesy of HYUNDAI MOTOR AMERICA
  16. Loosen the heater & blower unit mounting bolt (A).
    Fig 11: Identifying Heater & Blower Unit Mounting Bolt
    G08811986Courtesy of HYUNDAI MOTOR AMERICA
  17. Loosen the heater & blower unit mounting bolts (A).
    Fig 12: Identifying Heater & Blower Unit Mounting Bolt
    G08811987Courtesy of HYUNDAI MOTOR AMERICA
  18. Loosen the cowl cross member mounting bolts (A) and then remove the crash pad and heater & blower unit assembly (B).
    Fig 13: Identifying Cowl Cross Member Mounting Bolts, Heater & Blower Unit Assembly
    G08811988Courtesy of HYUNDAI MOTOR AMERICA
  19. Disconnect the connectors and then remove the heater & blower unit (A) from the crash pad.
    Fig 14: Identifying Heater & Blower Unit
    G08811989Courtesy of HYUNDAI MOTOR AMERICA
  20. Remove the blower unit (A) from heater unit after loosening screws.
    Fig 15: Identifying Heater Blower Unit
    G08811990Courtesy of HYUNDAI MOTOR AMERICA
  21. Loosen the mounting screws and then remove the heater core cover (A).
    Fig 16: Identifying Heater Core Cover With Mounting Screws
    G08811991Courtesy of HYUNDAI MOTOR AMERICA
  22. Disconnect the heater core (A) from heater unit.
    Fig 17: Identifying Heater Core
    G08811992Courtesy of HYUNDAI MOTOR AMERICA
  23. Loosen the heater unit lower case mount screws and then remove the heater unit lower case (A).
    Fig 18: Identifying Heater Unit Lower Case
    G08811993Courtesy of HYUNDAI MOTOR AMERICA
  24. Remove the evaporator core (A).
    Fig 19: Identifying Evaporator Core
    G08811994Courtesy of HYUNDAI MOTOR AMERICA
    CAUTION: Be careful that the inlet and outlet pipe are not bent during heater core removal, and pull out the heater core.
  25. Installation is the reverse order of removal.
    NOTE:
    • If you're installing a new evaporator, add refrigerant oil (PAG OIL).
    • Replace the O-rings with new ones at each fitting, and apply a thin coat of refrigerant oil before installing them. Be sure to use the right O-rings for R-134a to avoid leakage.
    • Immediately after using the oil, replace the cap on the container, and seal it to avoid moisture absorption.
    • Do not spill the refrigerant oil on the vehicle; it may damage the paint; if the refrigerant oil contacts the paint, wash it off immediately
    • Apply sealant to the grommets.
    • Make sure that there is no air leakage.
    • Charge the system and test its performance.
    • Do not interchange the inlet and outlet heater hoses and install the hose clamps securely.
    • Refill the cooling system with engine coolant
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