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Repair Procedures: Replacement

WARNING: This page is about a different car, the 2017 Kia Sedona. However, it is still accessible from the selected car via links, so may be relevant.
  1. Disconnect the negative (-) battery terminal.
  2. After loosening the nuts and bolts, remove the main crash pad and cowl cross bar assembly (A) altogether. (Refer to Heater - "HEATER UNIT ")
  3. Remove the heater core cover (A) after loosening the mounting screws.
    Fig 1: Removing Heater Core Cover Mounting Screws
    G12272741Courtesy of KIA MOTORS AMERICA, INC.
  4. Pull out the heater core (A) from the heater unit.
    Fig 2: Locating Heater Core From Heater Unit
    G12272742Courtesy of KIA MOTORS AMERICA, INC.
  5. Install in the reverse order of removal.
    • When installing a new heater core, 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 refrigerant oil on the vehicle as it may damage the paint. If refrigerant oil comes in contact with 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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