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Home >> Kia >> 2011 >> Soul Base >> 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.
  4. Remove the bolts (A) and the expansion valve (B) from the evaporator core.

    Plug or cap the lines immediately after disconnecting them to avoid moisture and dust contamination.

    Fig 1: Identifying Expansion Valve & Bolts
    G06525782Courtesy of KIA MOTORS AMERICA, INC.
  5. Disconnect the inlet (C) and outlet (D) heater hoses from the heater unit.
    Fig 2: Identifying Inlet & Outlet Heater Hoses
    G06525783Courtesy of KIA MOTORS AMERICA, INC.
    CAUTION:
    • Engine coolant will spill 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 crash pad (Refer to CRASH PAD ).
  7. Remove the cowl cross bar assembly. (Refer to COWL CROSS BAR REPLACEMENT .)
  8. Remove the heater & blower unit (A) after loosening mounting bolts.
    Fig 3: Identifying Heater & Blower Unit
    G06525784Courtesy of KIA MOTORS AMERICA, INC.
  9. Remove the cover (A).
    Fig 4: Identifying Heater/Blower Unit Cover
    G06525785Courtesy of KIA MOTORS AMERICA, INC.
  10. Be careful that the inlet and outlet pipe are not bent during heater core removal, and pull out the heater core (A).
    Fig 5: Identifying Heater Core
    G06525786Courtesy of KIA MOTORS AMERICA, INC.
  11. Remove the intake assembly (A).
    Fig 6: Identifying Intake Assembly
    G06525787Courtesy of KIA MOTORS AMERICA, INC.
  12. Remove the heater unit lower case (A).
    Fig 7: Identifying Heater Unit Lower Case
    G06525788Courtesy of KIA MOTORS AMERICA, INC.
  13. Remove the evaporator core (A).
    Fig 8: Identifying Evaporator Core
    G06525789Courtesy of KIA MOTORS AMERICA, INC.
  14. Be careful that the inlet and outlet pipe are not bent during heater core removal, and pull out the heater core.
  15. Install the heater core in the reverse order of removal.
  16. Installation is the reverse order of removal, and note these items :
    1. If you're installing a new evaporator, add refrigerant oil (ND-OIL8).
    2. Replace the O-rings with new ones at each fitting, and apply a thin coat of refrigerant oil before installing. Be sure to use the right O-rings for R-134a to avoid leakage.
    3. Immediately after using the oil, replace the cap on the container, and seal it to avoid moisture absorption.
    4. Do not spill the refrigerant oil on the vehicle; it may damage paint; if the refrigerant oil contacts the paint, wash off immediately.
    5. Apply sealant to the grommets.
    6. Make sure that there is no air leakage.
    7. Charge the system and test its performance.
    8. Do not interchange the inlet and outlet heater hoses and install the hose clamps securely.
    9. Refill the cooling system with engine coolant.
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