Hyundai Elantra Owners and Service Manuals

Hyundai Elantra: Heater / Heater Unit

Hyundai Elantra (CN7) 2021-2024 Service Manual / Heating, Ventilation and Air Conditioning / Heater / Heater Unit

Components and components location
Component Location

1. Heater unit assembly



Compoents

1. Heater unit assembly
2. Heater tube cover
3. Heater core assembly
4. Mode control actuator [LH]
5. Dummy PTC
6. Temperature control actuator [LH]
7. Heater case [LH]
8. Separator (Out)
9. Heater case [CTR]
10. Heater & Blower duct seal
11. DEF door assembly
12. Vent door assembly
13. Floor door assembly
14. Mode door assembly
15. Shaft temperature door
16. Temperature door assembly
17. Shaft temperature door
18. Heater lower cover
19. Drain hose
20. Heater case [RH]
21. Intake acutator
22. Temperature control actuator [RH]
23. Shower duct [RH]
24. Evaporator temperature sensor
25. Evaporator core assembly



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 Engine Mechanical System - "Coolant")
4.
Remove the bolts and the expansion valve (A) from the evaporator core.
Tightening torque :
8.8 - 13.7 N.m ( 0.9 - 1.4 kgf.m, 6.5 - 10.1 Ib-ft)

   
•
Plug or cap the lines immediately after disconnecting them to avoid moisture and dust contamination.
•
When installing, replace with a new O-ring.
5.
Disconnect the heater hoses (A) from the heater unit.
   
•
Engine coolant will run out when the hoses are disconnected; drain it into a clean drip pan. Be sure not to let coolant spill on electrical parts or painted surfaces. If any coolant spills, rinse it off immediately.

6.
Remove the cowl top cover.
(Refer to Body (Interior and Exterior) - "Cowl Top Cover")
7.
Remove the battery.
(Refer to Engine Electrical System - "Battery")
8.
Loosen the cowl cross member mounting bolts.

9.
Remove the front pillar trim.
(Refer to Body (Interior and Exterior) - "Front Pillar Trim")
10.
Remove the floor console assembly.
(Refer to Body (Interior and Exterior) - "Floor Console Assembly")
11.
Remove the shift lever assembly.
(Refer to Automatic Transmission System - "Shift Lever")
12.
Remove the cowl side trim.
(Refer to Body (Interior and Exterior) - "Cowl Side Trim")
13.
Remove the crash pad lower panel.
(Refer to Body (Interior and Exterior) - "Crash Pad Lower Panel")
14.
Remove the steering column shroud lower panel.
(Refer to Body (Interior and Exterior) - "Steering Column Shroud Panel")
15.
Remove the steering wheel.
(Refer to Steering System - "Steering Wheel")
16.
Remove the multifunction switch.
(Refer to Body Electrical System - "Multifunction Switch")
17.
Lower the steering column after loosening the mounting bolts.
(Refer to Steering System - "Steering Column and Shaft")
18.
Disconnect the junction box connectors (A).

19.
Disconnect the multi box connectors (A).
[LH]

[RH]

20.
Remove the center console duct (A).

21.
Disconnect the airbag control module (SRSCM) connector (A).

22.
Remove the rear air duct (A) and separate the floor carpet (B) to obtain space for removing the rear heating duct.

23.
Remove the front air duct (A).

24.
Loosen the cowl blower unit mounting bolts.
Tightening torque :
3.9 - 5.9 N.m ( 0.4 - 0.6 kgf.m, 2.9 - 4.3 Ib-ft)

25.
Remove the drain hose (A).

26.
Disconnect the connectors (A) and the mounting clips in the front pillar.
[LH]

[RH]

27.
After loosening the bolts and nuts remove the main crash pad and cowl cross bar assembly (A) together.

28.
Disconnect the heater & blower unit connectors.
[Driver's side]
1)
Loosen the mounting screw, remove the shower duct (A).

2)
Disconnect the temperature control actuator connector (A).

3)
Disconnect the mode control actuator connector (A).

[Passenger's side]
1)
Loosen the mounting screw, remove the shower duct (A).

2)
Disconnect the intake actuator connector (A).

3)
Disconnect the temperature control actuator connector (A).

4)
Disconnect the power mosfet connector (A).

5)
Disconnect the blower motor connector (A).

6)
Disconnect the evaporator temperature sensor connector (A).

29.
Loosen the heater & blower unit mounting bolt.
Tightening torque :
3.9 - 5.9 N.m ( 0.4 - 0.6 kgf.m, 2.9 - 4.3 Ib-ft)

30.
Remove the heater and blower unit (A) from the crash pad after loosening the mounting nuts.
Tightening torque :
3.9 - 5.9 N.m ( 0.4 - 0.6 kgf.m, 2.9 - 4.3 Ib-ft)

31.
Separate the heater unit (A) from the heater & blower unit assembly after loosening the screws.

32.
To install, reverse the removal procedure.

    Heater

    ..

    Heater Core

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

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