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Home › Kia › 2017 › Forte EX › Repair and Diagnosis › Heating, Ventilation & A/C (HVAC) › HVAC Control Systems › Heater System › Heater Core › Repair Procedures › Replacement

Repair Procedures: Replacement

  1. Disconnect the negative (-) battery terminal.
  2. Remove the heater and blower assembly.

    (Refer to Heater - "HEATER UNIT ")

  3. Remove the heater core cover (A) after loosening the mounting screws.
    Fig 1: Removing Heater Core Cover
    G12166746Courtesy of KIA MOTORS AMERICA, INC.
  4. Pull out the heater core (A) from the heater unit.
    Fig 2: Pulling Out Heater Core From Heater Unit
    G12166747Courtesy of KIA MOTORS AMERICA, INC.
  5. Install in the 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-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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