Nissan Sentra. Manual - part 537

 

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Nissan Sentra. Manual - part 537

 

 

HA-42

< REMOVAL AND INSTALLATION >

HEATING AND COOLING UNIT ASSEMBLY

HEATING AND COOLING UNIT ASSEMBLY

Exploded View

INFOID:0000000009756317

WITH AIR CONDITIONING

ALIIA0657ZZ

1.

Defroster seal

2.

Center ventilator seal

3.

Upper distribution module

4.

Side ventilator seal (LH)

5.

Blower motor

6.

Blower unit

7.

Intake door motor

8.

Power transistor

9.

Power transistor wiring harness

10. Front floor duct (LH)

11. Vent and defroster linkage

12. Mode door motor

13. Heater core

14. Heater core pipes grommet

15. Heating and cooling unit

16. In-cabin microfilter

17. In-cabin microfilter cover

18. Air mix door motor (LH) (Automatic A/C only)

19. Vent and defroster linkage

20. Front floor duct (RH)

21. Air mix door motor (RH)

22. Expansion valve

23. Evaporator

24. Aspirator (Automatic A/C only)

25. Vent and defroster linkage

26. Side ventilator seal (RH)

HEATING AND COOLING UNIT ASSEMBLY

HA-43

< REMOVAL AND INSTALLATION >

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WITHOUT AIR CONDITIONING

HEATING AND COOLING UNIT ASSEMBLY
HEATING AND COOLING UNIT ASSEMBLY : Removal and Installation

INFOID:0000000009756318

NOTE:

When removing components such as hoses, lines/tubes, etc., cap or plug openings to prevent fluid from spill-

ing.

REMOVAL

1. Discharge the refrigerant. Refer to 

HA-23, "Recycle Refrigerant"

.

2. Drain the cooling system. Refer to 

CO-12, "Changing Engine Coolant"

.

3. Remove the instrument panel assembly. Refer to 

IP-14, "Removal and Installation"

.

4. Remove the steering column. Refer to 

ST-12, "Removal and Installation"

.

5. Remove the center console. Refer to 

IP-17, "Removal and Installation"

.

6. Remove the wiper drive assembly. Refer to 

WW-62, "Removal and Installation"

.

ALIIA0661ZZ

1.

Defroster seal

2.

Center ventilator seal

3.

Upper distribution module

4.

Side ventilator seal (LH)

5.

Blower motor

6.

Blower unit

7.

Intake door motor

8.

Power transistor

9.

Power transistor wiring harness

10. Front floor duct (LH)

11. Vent and defroster linkage

12. Mode door motor

13. Heater core

14. Heater core pipes grommet

15. Heating and cooling unit

16. In-cabin microfilter

17. In-cabin microfilter cover

18. Front floor duct (RH)

19. Air mix door motor

20. Vent and defroster linkage

21. Side ventilator seal (RH)

HA-44

< REMOVAL AND INSTALLATION >

HEATING AND COOLING UNIT ASSEMBLY

7. Remove the steering member bolt (A).

(1): Windshield glass

NOTE:

The steering member bolt (A) can be found near the drivers side

cowl area in the engine compartment.

8. Remove the push nut (A) from the expansion valve insulator (1)

and reposition.

9. Remove the bolt (A) that retains the low-pressure flexible hose

and high-pressure pipe to the expansion valve.

CAUTION:

Cap or wrap the joint of the pipe with suitable material such

as vinyl tape to avoid the entry of air.

10. Disconnect the low-pressure pipe and high-pressure pipe from the expansion valve.
11. Disconnect the heater hoses from the heater core pipes.
12. Remove the remaining steering member bolts.
13. Disconnect the harness connectors from the heating and cooling unit assembly and steering member.
14. Remove the heating and cooling unit assembly and steering member as an assembly from the vehicle.
15. Separate the heating and cooling unit assembly from the steering member.

INSTALLATION

Installation is in the reverse order of removal.

CAUTION:

• Do not reuse O-rings.

• Apply A/C oil to new O-rings for installation.

• After charging refrigerant, check for leaks. Refer to 

HA-21, "Leak Test"

.

HEATER CORE
HEATER CORE : Removal and Installation

INFOID:0000000009756319

REMOVAL

The heater core is not serviced separately and must be replaced with the heating and cooling unit assembly.

Refer to 

HA-43, "HEATING AND COOLING UNIT ASSEMBLY : Removal and Installation"

.

EVAPORATOR

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HEATING AND COOLING UNIT ASSEMBLY

HA-45

< REMOVAL AND INSTALLATION >

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EVAPORATOR : Removal and Installation

INFOID:0000000009756320

REMOVAL

The evaporator is not serviced separately and must be replaced with the heating and cooling unit assembly.

Refer to 

HA-45, "EVAPORATOR : Removal and Installation"

.

EXPANSION VALVE
EXPANSION VALVE : Removal and Installation

INFOID:0000000009756321

REMOVAL

1. Discharge the refrigerant. Refer to 

HA-23, "Recycle Refrigerant"

.

2. Remove the push nut (A) from the expansion valve insulator (1)

and reposition.

3. Remove the bolt (A) that retains the low-pressure flexible hose

and high-pressure pipe to the expansion valve.

4. Disconnect the low-pressure pipe and high-pressure pipe from the expansion valve.
5. Remove the expansion valve bolts.
6. Remove the expansion valve.

INSTALLATION

Installation is in the reverse order of removal.

CAUTION:

• Do not reuse O-rings.

• Apply A/C oil to the new expansion valve O-rings for installation.

• After charging refrigerant, check for leaks. Refer to 

HA-21, "Leak Test"

.

ALIIA0660ZZ

ALIIA0654ZZ

 

 

 

 

 

 

 

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