Infiniti G35 (V35) Sedan. Manual - part 1424

VTL-34

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HEATER & COOLING UNIT ASSEMBLY

HEATER & COOLING UNIT ASSEMBLY

Exploded View

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1.

Aspirator

2.

Aspirator hose

3.

Front heater duct

4.

Foot duct (left)

5.

Defroster seal

6.

Packing

7.

Ventilator seal

8.

Ventilator door (left)

9.

Ventilator door (right)

10. Foot duct (right)

11.

Defroster door lever

12.

Foot door lever

13. Ventilator door lever

14.

Ventilator door link

15.

Main link

16. Mode door motor bracket

17.

Mode door motor

18.

Air mix door motor (passenger side)

19. Intake sensor

20.

Intake sensor bracket

21.

O-ring

22. Low-pressure pipe 1

23.

High-pressure pipe 2

24.

Expansion valve

25. Cooler pipe grommet

26.

Insulator

27.

Evaporator cover adapter

28. Heater pipe bracket

29.

Case packing

30.

Heater & cooling unit case (left)

31. Heater pipe grommet

32.

Heater core

33.

Air mix door motor (driver side)

*

34. Foot door (left)

35.

Rear ventilator door

36.

Foot door (right)

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HEATER & COOLING UNIT ASSEMBLY

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Removal and Installation

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REMOVAL

1.

Use a refrigerant collecting equipment (for HFC-134a) to discharge the refrigerant.

2.

Drain engine coolant from cooling system. Refer to 

CO-8, "Draining"

.

3.

Remove cowl top cover. Refer to 

EXT-18, "Removal and Installation"

.

4.

Disconnect one-touch joint between low-pressure pipe 1 (1) and
low-pressure pipe 2 (2) with disconnector (SST: 9253089916)
(A).

CAUTION:

Cap or wrap the joint of low-pressure pipe 1 and low-pres-
sure pipe 2 with suitable material such as vinyl tape to
avoid the entry of air.

5.

Disconnect one-touch joint between high-pressure pipe 1 (3)
and high-pressure pipe 2 (4) with disconnector (SST:
9253089908).

CAUTION:

Cap or wrap the joint of high-pressure pipe 1 and high-pres-
sure pipe 2 with suitable material such as vinyl tape to avoid the entry of air.

6.

Remove clamp (A), and then disconnect heater hoses (1).

7.

Remove instrument panel & pad. Refer to 

IP-12, "Removal and Installation"

.

8.

Remove blower unit. Refer to 

VTL-30, "Removal and Installation"

.

9.

Remove clips of vehicle harness from steering member.

10. Remove mounting nuts (A), and then remove instrument stays (1).

37.

Max. cool door lever

38.

Foot door link

39. Defroster door link

40.

Max. cool door link

41.

Main link sub

42. Evaporator cover

43.

Heater & cooling unit case (right)

44.

Evaporator

45. Drain hose

46.

Clamp

47.

Air mix door (Slide door)

48. Air mix door adapter

49.

Heater pipe cover

50.

Max. cool door (left)

51. Defroster door (left)

52.

Center case

53.

Defroster door (right)

54. Max. cool door (right)

*

With left and right ventilation temperature separately system.

Refer to 

GI-4, "Components"

 for symbols in the figure.

Refer to 

GI-4, "Components"

 for symbols in the figure.

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HEATER & COOLING UNIT ASSEMBLY

11. Remove clamp (A), and then remove drain hose (1).

12. Remove mounting bolts (A) from heater & cooling unit assembly

(1).

13. Remove front defroster nozzle, side defroster nozzles and ventilator duct. Refer to 

VTL-46, "FRONT

DEFROSTER NOZZLE, SIDE DEFROSTER NOZZLES AND VENTILATOR DUCT : Removal and Instal-
lation"

. 

14. Remove steering column mounting bolts (A) and nuts (B). Refer to 

IP-12, "Removal and Installation"

.

15. Remove steering member mounting bolts (C).

16. Remove steering member (1), and then remove heater & cooling unit (2).

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Refer to 

GI-4, "Components"

 for symbols in the figure.

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HEATER & COOLING UNIT ASSEMBLY

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INSTALLATION

Installation is basically the reverse order of removal.

CAUTION:

• Replace O-rings of low-pressure pipe 1, 2 and high-pressure pipe 1, 2 with new ones, and then apply

compressor oil to it when installing it.

• Female-side piping connection is thin and easy to deform. Slowly insert the male-side piping

straight in axial direction.

• Insert piping securely until a clicks is heard.
• After piping connection is completed, pull male-side piping by hand to make sure that connection

does not come loose.

• When recharging refrigerant, check for leaks.
NOTE:
• Perform 4WAS front actuator adjustment (WITH 4WAS). Refer to 

STC-27, "4WAS FRONT ACTUATOR

NEUTRAL POSITION ADJUSTMENT : Description"

.

• When filling radiator with engine coolant, refer to 

CO-9, "Refilling"

.

• Recharge the refrigerant.

Heater & cooling unit (1) 
assembly mounting bolt 
(A)

: 6.9 N·m (0.7 kg·m, 61 in-
lb)

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