HEATING AND AIR CONDITIONING

For every task in Heating and Air Conditioning, the following safety requirement must be strictly enforced:

Comply with personal and environmental safety practices associated with clothing; eye protection; hand tools; power equipment; proper ventilation; and the handling, storage, and disposal of chemicals/materials in accordance with local, state, and federal safety and environmental regulations.

VII. HEATING AND AIR CONDITIONING

A. A/C System Diagnosis and Repair

1. Identify and interpret heating and air conditioning concern; determine necessary action. P-1

2. Research applicable vehicle and service information, such as heating and air conditioning system operation, vehicle service history, service precautions, and technical service bulletins. P-1

3. Locate and interpret vehicle and major component identification numbers (VIN, vehicle certification labels, calibration decals). P-1

4. Performance test A/C system; diagnose A/C system malfunctions using principles of refrigeration. P-1

5. Diagnose abnormal operating noises in the A/C system; determine necessary action. P-2

6. Identify refrigerant type; conduct a performance test of the A/C system; determine necessary action. P-1

7. Leak test A/C system; determine necessary action. P-1

8. Inspect the condition of discharged oil; determine necessary action. P-2

9. Determine recommended oil for system application. P-1

VII. HEATING AND AIR CONDITIONING

B. Refrigeration System Component Diagnosis and Repair

1. Compressor and Clutch

1. Diagnose A/C system conditions that cause the protection devices (pressure, thermal, and PCM) to interrupt system operation; determine necessary action. P-2

2. Inspect A/C compressor drive belts; determine necessary action. P-2

3. Inspect, test, and/or replace A/C compressor clutch components and/or assembly. P-2

4. Remove and reinstall A/C compressor and mountings; measure oil quantity; determine necessary action. P-1

2. Evaporator, Condenser, and Related Components

1. Determine need for an additional A/C system filter; perform necessary action. P-3

2. Remove and inspect A/C system mufflers, hoses, lines, fittings, O-rings, seals, and service valves; perform necessary action. P-2

3. Inspect A/C condenser for airflow restrictions; perform necessary action. P-1

4. Remove and reinstall receiver/drier or accumulator/drier; measure oil quantity; determine necessary action. P-1

5. Remove and install expansion valve or orifice (expansion) tube. P-2

6. Inspect evaporator housing water drain; perform necessary action. P-3

7. Remove and reinstall evaporator; measure oil quantity; determine necessary action. P-3

8. Remove and reinstall condenser; measure oil quantity; determine necessary action. P-3

VII. HEATING AND AIR CONDITIONING

C. Heating, Ventilation, and Engine Cooling Systems Diagnosis and Repair

1. Diagnose temperature control problems in the heater/ventilation system; determine necessary action. P-2

2. Perform cooling system, cap, and recovery system tests (pressure, combustion leakage, and temperature); determine necessary action. P-1

3. Inspect engine cooling and heater system hoses and belts; perform necessary action. P-1

4. Inspect, test, and replace thermostat and housing. P-1

5. Determine coolant condition and coolant type for vehicle application; drain and recover coolant. P-1

6. Flush system; refill system with recommended coolant; bleed system. P-1

7. Inspect and test cooling fan, fan clutch, fan shroud, and air dams; perform necessary action. P-1

8. Inspect and test electric cooling fan, fan control system and circuits; determine necessary action. P-1

9. Inspect and test heater control valve(s); perform necessary action. P-2

10. Remove and reinstall heater core. P-3

VII. HEATING AND AIR CONDITIONING

D. Operating Systems and Related Controls Diagnosis and Repair

1. Diagnose malfunctions in the electrical controls of heating, ventilation, and A/C (HVAC) systems; determine necessary action. P-2

2. Inspect and test A/C-heater blower, motors, resistors, switches, relays, wiring, and protection devices; perform necessary action. P-1

3. Test and diagnose A/C compressor clutch control systems; determine necessary action. P-1

4. Diagnose malfunctions in the vacuum and mechanical components and controls of the heating, ventilation, and A/C (HVAC) system; determine necessary action. P-2
5. Inspect and test A/C-heater control panel assembly; determine necessary action. P-3

6. Inspect and test A/C-heater control cables and linkages; perform necessary action. P-3

7. Inspect A/C-heater ducts, doors, hoses, cabin filters and outlets; perform necessary action. P-3

8. Check operation of automatic and semi-automatic heating, ventilation, and air-conditioning (HVAC) control systems; determine necessary action. P-3

VII. HEATING AND AIR CONDITIONING

E. Refrigerant Recovery, Recycling, and Handling

1. Perform correct use and maintenance of refrigerant handling equipment. P-1

2. Identify (by label application or use of a refrigerant identifier) and recover A/C system refrigerant. P-1

3. Recycle refrigerant. P-1

4. Label and store refrigerant. P-1

5. Test recycled refrigerant for non-condensable gases. P-1

6. Evacuate and charge A/C system. P-1