Repair Procedures: Replacement

WARNING: This page is about a different car, the 2017 Hyundai Elantra. However, it is still accessible from the selected car via links, so may be relevant.

Disconnect the negative (-) battery terminal.
Remove the heater and blower assembly.
(Refer to Heater - "HEATER UNIT ")
Remove the heater core cover (A) after loosening the mounting screws.

Fig 1: Locating Heater Core Cover With Mounting Screws
Courtesy of HYUNDAI MOTOR AMERICA
Pull out the heater core (A) from the heater unit.

Fig 2: Pulling Out Heater Core From Heater Unit
Courtesy of HYUNDAI MOTOR AMERICA
To install, reverse the removal procedure.
- 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.