Hyundai Elantra CN7: Blower

Seventh generation (CN7; 2021–2024) / Hyundai Elantra CN7 2021-2024 Workshop Manual / Heating, Ventilation and Air Conditioning / Blower

Blower Unit

Components and components location

Component Location

1. Blower unit assembly

Components

1. Blower unit assebmly
2. Blower upper cover [LH]
3. Duct seal
4. Blower upper cover [RH]
5. Intake actuator
6. Air filter cover
7. Intake door

8. Air filter
9. Blower upper case
10. Blower plate
11. Blower lower case
12. Power mosfet
13. Resistor
14. Blower lower cover
15. Blower motor

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")

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.

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

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

32.	To install, reverse the removal procedure.

Blower Motor

Repair procedures

Inspection

1.	Connect the battery voltage and check the blower motor rotation.

Replacement

1.	Disconnect the negative (-) battery terminal.

2.	Disconnect the blower motor connector (A) and then remove the blower motor (B) after loosening the screws.

3.	To install, reverse the removal procedure

Power Mosfet

Description and operation

Description

It is installed to the DATC and adjusts the fan rpm by precisely controlling the voltage applied to the blower motor.

Repair procedures

Inspection

1.	Manually operate the control switch and measure the voltage of the blower motor.

Select the control switch to raise the voltage until high speed.

Fan Speed	Motor Voltage (V) (Manual)
1	3.8
2	5
3	6.1
4	7.3
5	8.5
6	9.7
7	10.9
8	Battery +

Replacement

1.	Disconnect the negative (-) battery terminal.

2.	Disconnect the power mosfet connector (A) and then remove the power mosfet (B) after loosening the mounting screws.

3.	To install, reverse the removal procedure.

Blower Resistor (Manual)

Repair procedures

Inspection

1.	Measure the resistance between the terminals.

2.	The measured resistance is not within specification, the blower resistor must be replaced. (After removing the resistor)

Replacement

1.	Disconnect the negative (-) battery terminal.

2.	Disconnect the connector (A) and then remove the blower resistor (B) after loosening the mounting screws.

3.	To install, reverse the removal procedure.

Climate Control Air Filter

Description and operation

Description

The climate control air filter is located in the blower unit. It eliminates foreign materials and odor. The particle filter performs a role as an odor filter as well as a conventional dust filter to ensure comfortable interior environment.

Repair procedures

Replacement

1.	Remove the glove box. (Refer to Body (Interior and Exterior) - "Glove Box")

2.	Remove the filter cover (A) by pressing the knob.

3.	Replace the air filter (A) with a new one according to the direction of air filter.

4.	To install, reverse the removal procedure.

Intake Actuator

Description and operation

Description

The intake actuator is located at the blower unit. It regulates the intake door by a signal from the control unit. Pressing the intake selection switch will shift between recirculation and fresh air modes.

Components and components location

Components Location

1. Intake actuator

Specifications

Door position	Voltage (V)	Error detecting
Max. cooling	0.3 ± 0.15	Low voltage : 0.1V or less
Max. heating	4.7 ± 0.15	High voltage : 4.9V or more

Repair procedures

Inspection

1.	Verify that the intake actuator operates to the fresh position when connecting 12V to terminal 3 and grounding terminal 7.

Verify that the intake actuator operates to the recirculation position when connected in reverse.

Pin No	Function
1	-
2	-
3	Fresh air
4	Sensor REF (+5V)
5	Feedback signal
6	Sensor ground
7	Recirculated air

3.	Connect the intake actuator connector.

4.	Turn the ignition switch ON.

5.	Check the voltage between terminal 6 and 5.

6.	If the measured voltage is not within specification, check the operation by replacing the existing intake actuator with a new genuine part. After that, determine whether replacement of the temperature control actuator is required or not.

Replacement

1.	Disconnect the negative (-) battery terminal.

2.	Remove the Heater & Blower unit assebmly. (Refer to Heater - "Heater Unit")

3.	Disconnect the connector (A) and then remove the intake actuator (B) after loosening the mounting screws.

4.	To install, reverse the removal procedure.

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