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Repair Procedures: Replacement

WARNING: This page is about a different car, the 2025 Kia Soul. However, it is still accessible from the selected car via links, so may be relevant.
  1. Disconnect the negative (-) battery terminal.
  2. Remove the heater and blower assembly.

    (Refer to Heater - "HEATER UNIT ")

  3. Separate the evaporator temperature sensor connector (A) in the direction of the arrow.
    G15717303Courtesy of KIA MOTORS AMERICA, INC.
  4. Remove the heater core cover (A) after loosening the mounting screw.
    G15717304Courtesy of KIA MOTORS AMERICA, INC.
  5. Pull out the heater core (A) from the heater unit.
    G15717305Courtesy of KIA MOTORS AMERICA, INC.
  6. Install in reverse order of removal.
    NOTE:
    • If you're 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-1234yf 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.
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