Heating and Air Conditioning

• Description and operation
1. Blower motor. Blower motor relay
2. Blower motor resistor
3. Blower motor switch. Compressor
4. Compressor clutch. Compressor clutch relay
5. Condenser. Electronic cycling clutch switch
6. Evaporator coil. Expansion valve
7. Filter-drier. Heater and air conditioner
8. Heater and air conditioner control. Heater core
9. High pressure cut-off switch. High pressure relief valve
10. Low pressure cut-off switch. Rear overhead air conditioner
11. Refrigerant. Refrigerant lines
12. Refrigerant line couplers. Refrigerant oil
13. Refrigerant system service ports. Vacuum check valve
14. Vacuum reservoir
• Diagnosis and testing
1. A/c performance
2. Blower motor. Blower motor relay
3. Blower motor resistor. Blower motor switch
4. Compressor
5. Compressor clutch coil. Electronic cycling clutch switch (front unit only)
6. Heater-a/c control. Heater performance
7. Dual function high pressure switch/high pressure cut-off switch. Low pressure cut-off switch
8. Refrigerant system leaks
9. Refrigerant system service equipment. Vacuum system
• Service procedures
• Removal and installation
1. Service warnings and precautions
2. B-pillar refrigerant line
3. Blower motor
4. Blower motor relay. Blower motor resistor
5. Compressor. Compressor clutch
6. Compressor clutch relay. Condenser
7. Ducts and outlets
8. Electronic cycling clutch switch. Evaporator coil
9. Expansion valve
10. Filter-drier. Heater-a/c control
11. Heater-a/c housing
12. Heater-a/c housing door
13. Heater core. High pressure cut-off switch
14. Liquid line
15. Low pressure cut-off switch. Mode door vacuum actuator
16. Rear blower motor switch. Rear overhead a/c unit
17. Refrigerant line coupler
18. Suction and discharge line
19. Suction line jumper
20. Temperature control cable
21. Underbody refrigerant line
22. Vacuum check valve. Vacuum reservoir
• Adjustments