Hyundai Santa Fe: Heater / Heater Unit. Repair procedures

Hyundai Santa Fe (TM) 2019-2024 Service Manual / Heating,Ventilation And Air Conditioning / Heater / Heater Unit. 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 cowl top cover.
(Refer to Body - "Cowl Top Cover")
5.
Loosen the mounting bolts and separate the expension valve (A) from the evaporator core.
Tightening torque :
8.8 - 13.7 N.m (0.9 - 1.4 kgf.m , 6.5 - 10.1 lb-ft)

6.
Separate the heater hose (A).
7.
Loosen the cowl cross bar assembly mounting bolts.
8.
Remove the front seat assembly.
(Refer to Body - "Front Seat Assembly")
9.
Remove the floor console assembly.
(Refer to Body - "Floor Console Assembly")
10.
Remove the front pillar trim.
(Refer to Body - "Front Pillar Trim")
11.
Remove the cowl side trim.
(Refer to Body - "Cowl Side Trim")
12.
Remove the crash pad lower panel.
(Refer to Body - "Crash Pad Lower Panel")
13.
Remove the steering column shroud panel.
(Refer to Body - "Steering Column Shroud Panel")
14.
Remove the steering wheel.
(Refer to Steering System - "Steering Wheel")
15.
Remove the multifunction switch.
(Refer to Body Electrical System - "Multifunction Switch")
16.
Lower the steering column after loosening the mounting bolts.
(Refer to Steering System - "Steering Column and Shaft")
17.
Remove the front door scuff trim.
(Refer to Body - "Door Scuff Trim")
18.
Loosen the mounting bolt and nut, remove the accelerator pedal module (A).
19.
Press the lock pin, separate the accelerator pedal connector (A).
20.
Remove the rear air duct (A) and then separate the floor carpet (B) backwards.
21.
Loosen the mounting nuts and remove the rear heating duct (A).
22.
Disconnect the junction box connectors (A).
23.
Disconnect the multi box connectors (A).
[Driver]

[Passenger]
24.
Loosen the mounting clips (B) in the front pillar and Disconnect the connectors (A).
[Driver]

[Passenger]
25.
Remove the drain hose (A).
26.
Remove the lower mounting bolt of the blower unit.
Tightening torque :
3.9 - 5.9 N.m (0.4 - 0.6 kgf.m , 2.9 - 4.3 lb-ft)
[Driver]

[Passenger]
27.
After loosening the bolts and nuts remove the crash pad and heater & blower unit assembly (A) together.
28.
Disconnect the heater & blower unit connectors.
(1)
Press the lock pin, separate the evaporator temperature sensor connector (A).
(2)
Press the lock pin, separate the mode control actuator connector (A) and driver's temperature control actuator connector (B).
(3)
Press the lock pin, separate the intake actuator connector (A).
(4)
Press the lock pin, separate the power mosfet connector (A).
(5)
Press the lock pin, separate the PTC heater connector (A).
(6)
Press the lock pin, separate the blower motor connector (A).
(7)
Press the lock pin, separate the PM sensor connector (A).
(8)
Press the lock pin, separate the auto defogging actuator connector (A) and passenger's temperature actuator connector (B).
29.
Loosen the heater & blower unit mounting bolt (A).
Tightening torque :
3.9 - 5.9 N.m (0.4 - 0.6 kgf.m , 2.9 - 4.3 lb-ft)

30.
Loosen the mounting nuts and remove the heater & blower unit (A) from the crash pad.
Tightening torque :
3.9 - 5.9 N.m (0.4 - 0.6 kgf.m , 2.9 - 4.3 lb-ft)

31.
Loosen the mounting screw and separate the heater unit (A).
Tightening torque :
3.9 - 5.9 N.m (0.4 - 0.6 kgf.m , 2.9 - 4.3 lb-ft)

32.
Install in the reverse order of removal.

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