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
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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
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
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.
HA-43, "HEATING AND COOLING UNIT ASSEMBLY : Removal and Installation"
.
EVAPORATOR
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ALIIA0660ZZ
ALIIA0654ZZ
HEATING AND COOLING UNIT ASSEMBLY
HA-45
< REMOVAL AND INSTALLATION >
C
D
E
F
G
H
J
K
L
M
A
B
HA
N
O
P
EVAPORATOR : Removal and Installation
INFOID:0000000009756320
REMOVAL
The evaporator is not serviced separately and must be replaced with the heating and cooling unit assembly.
HA-45, "EVAPORATOR : Removal and Installation"
EXPANSION VALVE
EXPANSION VALVE : Removal and Installation
INFOID:0000000009756321
REMOVAL
1. Discharge the refrigerant. Refer to
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
.
ALIIA0660ZZ
ALIIA0654ZZ
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