Hyundai Elantra: Heater / Evaporator Core

Hyundai Elantra (CN7) 2021-2024 Service Manual / Heating, Ventilation and Air Conditioning / Heater / Evaporator 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 evaporator core (A) from the heater unit.

5.	Remove the evaporator temperature sensor (A).

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 Core

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

Temperature Control Actuator

Description and operation DescriptionThe temperature control actuator is located at the heater unit. It regulates the temperature by the procedure as follows...

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Repair procedures Replacement and Air Bleeding • Never remove the reservoir tank cap when the engine is hot. Serious scalding could be caused by hot fluid under high pressure escaping from the radiator. • When pouring engine coolant, be sure to shut the relay box lid and not to let coolant spill on the electri..

Tachometer

The tachometer indicates the approximate number of engine revolutions per minute (RPM).

Use the tachometer to select the correct shift points and to prevent lugging and/ or over-revving the engine.

NOTICE

Do not operate the engine within the tachometer's RED ZONE. This may cause severe engine damage.