Hyundai Accent: Heater / Heater Unit

Hyundai Accent (HC) (2017 - 2022) Service Manual / Heating, Ventilation and Air Conditioning / Heater / Heater Unit

- Component Location

1. Heater unit assembly


- Compoents

1. Heater core cover
2. Heater core & seal assembly
3. Heater case [LH]
4. Mode control actuator
5. Air guide [LH]
6. Heater unit pad
7. Deforster door assembly
8. Vent door assembly
9. Floor door assembly
10. Temperature door assembly
11. Lower case
12. Drain hose
13. Heater case [RH]
14. Temperature control actuator
15. Air guide [RH]
16. Evaporator temperature sensor
17. Evaporator core
18. Auto defogging actuator
19. Inhale hose
20. Cool box assembly


- Replacement

   

When prying with a flat-tip screwdriver or use a prying trim tool, wrap it with protective tape, and apply protective tape around the related parts, to prevent damage.

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.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.

6.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.

7.Loosen the cowl cross member mounting bolts.

Tightening torque : 16.7 - 25.5 N.m (1.7 - 2.6 kgf.m, 12.3 -18.8 lb-ft)

8.Remove the floor console assembly.(Refer to Body - "Floor Console Assembly")

9.Remove the crash pad lower panel.(Refer to Body - "Crash Pad Lower Panel")

10.Remove both sides of 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 steering column shroud lower panel.(Refer to Body - "Steering Column Shroud Panel")

13.Remove the steering wheel.(Refer to Steering System - "Steering Wheel")

14.Remove the multifunction switch.(Refer to Body Electrical System - "Multifunction Switch")

15.Lower the steering column after loosening the mounting bolts.(Refer to Steering System - "Steering Column and Shaft")

16.Remove the shift lever assembly.(Refer to Automatic Transmission System - "Shift Lever")

17.Remove the rear air duct (A).

18.Separate the floor carpet (A) to obtain space for removing the rear heating duct.

19.Loosen the mounting nuts and remove the front air duct (A).

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

21.Disconnect the junction box connectors (A).

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

[Passenger's side]

23.Disconnect the connectors (A) and the mounting clips in the front pillar.

24.Remove the drain hose (A).

25.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)

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

27.Disconnect the heater & blower unit connectors.

(1)Disconnect the mode actuator connector (A) and remove the wiring mounting clips.

(2)Disconnect the auto defogging actuator connector (A) and intake actuator connector (B) remove the wiring mounting clips.

(3)Disconnect the temperature control actuator (A), power mosfet connector (B) and remove the wiring mounting clips.

(4)Disconnect the blower motor connector (A) and remove the wiring mounting clips.

28.Loosen the heater & blower unit mounting bolt (A).

29.Remove the heater and blower unit from the crash pad after loosening the mounting nuts.

30.Separate the blower unit (A) from the heater unit (B) after loosening the screws.

31.To install, reverse the removal procedure.

Heater

Temperature Control Actuator

Other information:

Hyundai Accent (HC) (2017 - 2022) Service Manual: Specifications

- Specifications Smart Key Unit ItemsSpecification Rated voltageDC 12V Operating voltageDC 9 - 16V Operating temperature-22°F to 167°F (-30°C to 75°C) LoadMax. 4mA (When welcome light function off) RF Receiver ItemsSpecification Frequency433.92 Mhz Antenna typeFSK (Frequency Shift Keying) Smart Key Fob ItemsSpecification BatteryLithium battery 3V 1EA Distance30m from vehicle, RF : 30m, Passive(LF) : 0.

Hyundai Accent (HC) (2017 - 2022) Service Manual: Troubleshooting

- Troubleshooting SymptomPossible causeRemedy Hard steeringImproper front wheel alignmentExcessive turning resistance of lower arm ball jointLow tire pressureNo power assistCorrectReplaceAdjustRepair and replace Poor return of steering wheel to centerImproper front wheel alignmentCorrect Poor or rough rideImproper front wheel alignmentMalfunctioning shock absorberBroken or worn stabilizerBroken or worn coil springWorn lower arm bushingCorrectRepair or replaceReplaceReplaceReplace the lower

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