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Home › Hyundai › 2016 › Azera Base › 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. Recover the refrigerant with a recovery/recycling/charging station.
  3. When the engine is cool, drain the engine coolant from the radiator.

    (Refer to "COOLANT ")

  4. Remove the heater & blower assembly.

    (Refer to "HEATER UNIT ")

  5. Remove the blower unit (B) from heater unit after loosening 3 screws.
    Fig 1: Blower Unit Screws
    G10369822Courtesy of HYUNDAI MOTOR AMERICA
    Fig 2: Blower Unit
    G10369823Courtesy of HYUNDAI MOTOR AMERICA
  6. Loosen the mounting screw and then remove the heater core cover (A).
    Fig 3: Heater Core Cover Mounting Screw
    G10369824Courtesy of HYUNDAI MOTOR AMERICA
  7. Remove the heater core (A) from heater unit.
    Fig 4: Heater Core And Heater Unit
    G10369825Courtesy of HYUNDAI MOTOR AMERICA
    NOTE:
    • Be careful that the inlet and outlet pipe are not bent during heater core removal/installation.
  8. Installation is the reverse order of removal
    NOTE:
    • If you're installing a new evaporator, add refrigerant oil (ND-OIL8).
    • 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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