Hyundai Elantra: Heater / Heater Core

Hyundai Elantra (CN7) 2021-2025 Service Manual / Heating, Ventilation and Air Conditioning / Heater / Heater Core

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.

4.	Pull out the heater core (A) from the heater unit.

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 or 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.

Heater Unit

Components and components location Component Location1. Heater unit assemblyCompoents1. Heater unit assembly2. Heater tube cover3. Heater core assembly4...

Evaporator Core

Repair procedures Replacement1.Disconnect the negative (-) battery terminal. 2.Remove the heater and blower assembly.(Refer to Heater - "Heater Unit") 3...

Other information:

Hyundai Elantra (CN7) 2021-2025 Service Manual: Repair procedures

Removal1.Disconnect the negative (-) battery terminal.2.Remove the glove box housing cover.(Refer to Body - "Glove Box Housing Cover")3.Remove the IBU unit (A) after loosening mounting nuts.4.Remove the IBU after disconnecting IBU connectors.Installation1...

Hyundai Elantra (CN7) 2021-2025 Service Manual: Components and components location

Component Location1. Integrated body control unit (IBU)2. Rear glass defogger switch3. Rear glass defogger..

Air bag collision sensors

1. SRS control module/Rollover sensor
2. Front impact sensors
3. Side impact sensors (acceleration)
4. Side impact sensors (pressure)