Hyundai Elantra: Heater / Heater Core
Repair procedures
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. 
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4. | Pull out the heater core (A) from the heater unit. 

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5. | To install, reverse the removal procedure. •
| If you're installing a new heater core, add refrigerant oil (PAG OIL). |
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| 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. |
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| Immediately after using the oil, replace the cap on the container, and seal it to avoid moisture absorption. |
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| 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. |
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| Apply sealant to the grommets. |
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| Make sure that there is no air leakage. |
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| Charge the system and test its performance. |
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| Do not interchange the inlet and outlet heater hoses and install the hose clamps securely. |
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Components and components location
Component Location1. Heater unit assemblyCompoents1. Heater unit assembly2. Heater tube cover3. Heater core assembly4...
Repair procedures
Replacement1.Disconnect the negative (-) battery terminal. 2.Remove the heater and blower assembly.(Refer to Heater - "Heater Unit") 3...
Other information:
The steering wheel audio control
switches are installed for your
convenience.
NOTICE
Do not operate audio remote control
buttons simultaneously.
VOLUME (VOL + / VOL -) (1)
Move the VOLUME toggle switch up
to increase volume.
Move the VOLUME toggle switch
down to decrease volume...
Repair procedures
Replacement1.Remove the rear door trim.(Refer to Rear Door - "Rear Door Trim")2.After loosening the mounting screws, remove the rear door inside handle (A).3.To install, reverse the removal procedure.
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Make sure the door locks / unlocks and opens / closes properly...