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Hyundai Equus: Heater Unit Repair procedures - Heater - Heating, Ventilation and Air Conditioning - Hyundai Equus VI 2009-2023 Service ManualHyundai Equus: 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 - УCoolantФ)
4.
Remove the expansion valve (A) from the evaporator core.


Tightening torque :
7.8 ~ 11.7 N.m (0.8 ~ 1.2 kgf.m, 5.7 ~ 8.6 Ib-ft)

   
Х
Plug or cap the lines immediately after disconnecting them to avoid moisture and dust contamination.
Х
When installing the expansion valve, replace with a new O-ring.
5.
Disconnect the inlet (A) and outlet (B) heater hoses 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 front pillar trim.
(Refer to Body - "Front Pillar Trim")
7.
Remove the front seat assembly.
(Refer to Body - "Front Seat Assembly")
8.
Remove the floor console assembly.
(Refer to Body - "Floor Console Assembly")
9.
Remove the shift lever assembly.
(Refer to Automatic Transaxle System - "Shift lever")
10.
Remove the cowl side trim.
(Refer to Body - "Cowl Side Trim")
11.
Remove both sides of the crash pad side cover.
(Refer to Body - "Crash Pad Side Cover")
12.
Remove the crash pad lower panel.
(Refer to Body - "Crash Pad Lower Panel")
13.
Remove the driver's side crash pad under cover (A).

14.
Remove the steering wheel.
(Refer to Steering System - "Steering Wheel")
15.
Remove the multifunction switch.
(Refer to Body Electrical System - "Multifunction Switch")
16.
Remove the steering column shroud panel.
(Refer to Body - "Steering Column Shroud Panel")
17.
Lower the steering column after loosening the mounting bolts.
(Refer to Steering System - "Steering Column and Shaft")
18.
Remove the glove box housing.
(Refer to Body - "Glove Box Housing")
19.
Disconnect the connectors (A) and loosen the mounting nut to remove the LVDS (B).

20.
Disconnect the junction box connectors (A).

21.
Disconnect the multi box connectors (A).
[Driver's side]

[Passenger's side]

22.
Disconnect the connectors (A) and the mounting clips in the front pillar.
[Driver's side]

[Passenger's side]

23.
After loosening the nuts and bolts remove the main crash pad (A) and cowl cross bar assembly (A) together.

24.
Loosen the drain hose fixing clip under the vehicle.
25.
Disconnect the heater unit connectors.
26.
Remove the heater and blower unit from the crash pad after loosening the mounting nuts.
27.
Separate the blower unit (A) from the heater unit (B) after loosening the screws.

28.
Install in the reverse order of removal.
    Heater Unit Components and Components Location
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    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 ...

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