2013 NATEF Task Area A-7 Heating, Ventilation, and A/C7-2013

• A. A/C System Diagnosis & Repair

• B. Refrigeration System Component D & R

• C. Heating, Ventilation & Engine Cooling

• D. Operating Systems & Related Controls

• E. Refrigerant Recover, Recycle & Handle

NATEF Task Area A-7 Heating, Ventilation, and Air Conditioning SystemsA. A/C System Diagnosis & Repair

Identify & interpret heating and air conditionng system concern; determine necessary action.

A7.A.1

P-1

NATEF Task Area A-7 Heating, Ventilation, and Air Conditioning SystemsA. A/C System Diagnosis & Repair

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

A7.A.2

P-1

NATEF Task Area A-7 Heating, Ventilation, and Air Conditioning SystemsA. A/C System Diagnosis & Repair

Complete work order to include customer information, vehicle identifying information, verify customer concern, related service history, cause, & correction.

“Oldie”

NATEF Task Area A-7 Heating, Ventilation, and Air Conditioning SystemsA. A/C System Diagnosis & Repair

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

“Oldie”

NATEF Task Area A-7 Heating, Ventilation, and Air Conditioning SystemsA. A/C System Diagnosis & Repair

Performance test A/C system; diagnose A/C system malfunctions using principles of refrigeration. Identify Components Only - MLR

A7.A.3

P-1

NATEF Task Area A-7 Heating, Ventilation, and Air Conditioning SystemsA. A/C System Diagnosis & Repair

Identify abnormal operating noises in the A/C system; determine necessary action.A7.A.4

P-2

NATEF Task Area A-7 Heating, Ventilation, and Air Conditioning SystemsA. A/C System Diagnosis & Repair

Identify refrigerant type; select and connect proper gauge set; record pressure readings.

A7.A.5

Low SideBlue GaugeCompound GaugePressure & Vacuum

High SideRed GaugePressure Gauge up to 300 PSIG

P-1

NATEF Task Area A-7 Heating, Ventilation, and Air Conditioning SystemsA. A/C System Diagnosis & Repair

Leak test (electronic & dye) A/C system; determine necessary action.A7.A.6

P-1

NATEF Task Area A-7 Heating, Ventilation, and Air Conditioning SystemsA. A/C System Diagnosis & Repair

Inspect the condition and quantity of refrigerant oil removed from system; determine necessary action.

A7.A.7

P-2

NATEF Task Area A-7 Heating, Ventilation, and Air Conditioning SystemsA. A/C System Diagnosis & Repair

Determine recommended oil and oil capacity for system application.A7.A.8

P-1

NATEF Task Area A-7 Heating, Ventilation, and Air Conditioning SystemsA. A/C System Diagnosis & Repair

Using scan tool, observe and record related HVAC data and trouble codes.A7.A.9

P-3

NATEF Task Area A-7 Heating, Ventilation, and Air Conditioning SystemsB. Refrigeration System Component Diagnosis and Repair

Inspect and replace A/C compressor drive belts, pulleys, and tensioners; determine necessary action.

A7.B.1

P-1

NATEF Task Area A-7 Heating, Ventilation, and Air Conditioning SystemsB. Refrigeration System Component Diagnosis and Repair

Inspect, test, and/or replace A/C compressor clutch components and/or assembly; check compressor clutch air gap; adjust as needed.

A7.B.2

P-1

NATEF Task Area A-7 Heating, Ventilation, and Air Conditioning SystemsB. Refrigeration System Component Diagnosis and Repair

Remove, inspect, and reinstall A/C compressor and mountings; determine recommended oil quantity.

A7.B.3

P-2

NATEF Task Area A-7 Heating, Ventilation, and Air Conditioning SystemsB. Refrigeration System Component Diagnosis and Repair

Identify hybrid vehicle A/C system electrical circuits, service and safety precautions.

A7.B.4

P-1

NATEF Task Area A-7 Heating, Ventilation, and Air Conditioning SystemsB. Refrigeration System Component Diagnosis and Repair

Determine need for A/C system filter; perform necessary action.A7.B.5

P-3

NATEF Task Area A-7 Heating, Ventilation, and Air Conditioning SystemsB. Refrigeration System Component Diagnosis and Repair

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

A7.B.6

P-2

NATEF Task Area A-7 Heating, Ventilation, and Air Conditioning SystemsB. Refrigeration System Component Diagnosis and Repair

Inspect A/C condenser for airflow restrictions; perform necessary action.A7.B.7 P-1

NATEF Task Area A-7 Heating, Ventilation, and Air Conditioning SystemsB. Refrigeration System Component Diagnosis and Repair

Remove and install receiver/drier or accumulator/drier; determine required oil quantity.

A7.B.8

P-2

NATEF Task Area A-7 Heating, Ventilation, and Air Conditioning SystemsB. Refrigeration System Component Diagnosis and Repair

Remove, inspect, and install expansion valve or orifice (expansion) tube.A7.B.9

P-1

NATEF Task Area A-7 Heating, Ventilation, and Air Conditioning SystemsB. Refrigeration System Component Diagnosis and Repair

Inspect evaporator housing water drain; perform necessary action.A7.B.10

P-1

NATEF Task Area A-7 Heating, Ventilation, and Air Conditioning SystemsB. Refrigeration System Component Diagnosis and Repair

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

A7.B.11

P-2

NATEF Task Area A-7 Heating, Ventilation, and Air Conditioning SystemsB. Refrigeration System Component Diagnosis and Repair

Determine procedure to remove and reinstall evaporator; determine required oil quantity.

A7.B.12

P-2

NATEF Task Area A-7 Heating, Ventilation, and Air Conditioning SystemsB. Refrigeration System Component Diagnosis and Repair

Remove, inspect, and reinstall condenser; determine required oil quantity.A7.B.13

P-2

NATEF Task Area A-7 Heating, Ventilation, and Air Conditioning SystemsC. Heating, Ventilation, and Engine Cooling System Diagnosis and Repair

Inspect engine cooling and heater systems hoses; perform necessary action.A7.C.1

P-1

NATEF Task Area A-7 Heating, Ventilation, and Air Conditioning SystemsC. Heating, Ventilation, and Engine Cooling System Diagnosis and Repair

Inspect and test heater control valve(s); perform necessary action.A7.C.2

P-2

NATEF Task Area A-7 Heating, Ventilation, and Air Conditioning SystemsC. Heating, Ventilation, and Engine Cooling System Diagnosis and Repair

Diagnose temperature control problems in the heater/ventilation system; determine necessary action.

A7.C.3

P-2

NATEF Task Area A-7 Heating, Ventilation, and Air Conditioning SystemsC. Heating, Ventilation, and Engine Cooling System Diagnosis and Repair

Determine procedure to remove, inspect, and reinstall heater core.A7.C.3

P-2

NATEF Task Area A-7 Heating, Ventilation, and Air Conditioning SystemsC. Heating, Ventilation, and Engine Cooling System Diagnosis and Repair

Perform cooling system pressure tests; check coolant condition, inspect and test radiator, pressure cap, coolant recovery tank, and hoses; perform necessary action.

“Oldie”

NATEF Task Area A-7 Heating, Ventilation, and Air Conditioning SystemsC. Heating, Ventilation, and Engine Cooling System Diagnosis and Repair

Inspect, test, and replace thermostat and housing.“Oldie”

NATEF Task Area A-7 Heating, Ventilation, and Air Conditioning SystemsC. Heating, Ventilation, and Engine Cooling System Diagnosis and Repair

Determine coolant condition and coolant type for vehicle application; drain and recover coolant.

“Oldie”

NATEF Task Area A-7 Heating, Ventilation, and Air Conditioning SystemsC. Heating, Ventilation, and Engine Cooling System Diagnosis and Repair

Flush system; refill system with recommended coolant; bleed system.“Oldie”

NATEF Task Area A-7 Heating, Ventilation, and Air Conditioning SystemsC. Heating, Ventilation, and Engine Cooling System Diagnosis and Repair

Inspect & test fan, fan clutch, fan shroud, air dams; perform necessary action.“Oldie”

NATEF Task Area A-7 Heating, Ventilation, and Air Conditioning SystemsC. Heating, Ventilation, and Engine Cooling System Diagnosis and Repair

Inspect and test electric fan, fan control system and circuits; determine necessary action.

“Oldie”

NATEF Task Area A-7 Heating, Ventilation, and Air Conditioning SystemsD. Operating Systems and Related Controls Diagnosis and Repair

Diagnose malfunctions in the electrical controls of heating, ventilation, and A/C systems; determine action.

“Oldie”

NATEF Task Area A-7 Heating, Ventilation, and Air Conditioning SystemsD. Operating Systems and Related Controls Diagnosis and Repair

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

A7.D.1

P-1

NATEF Task Area A-7 Heating, Ventilation, and Air Conditioning SystemsD. Operating Systems and Related Controls Diagnosis and Repair

Diagnose A/C compressor clutch control systems; determine necessary action.A7.D.2

P-2

NATEF Task Area A-7 Heating, Ventilation, and Air Conditioning SystemsD. Operating Systems and Related Controls Diagnosis and Repair

Diagnose malfunctions in the vacuum, mechanical, and electrical components and controls of the heating, ventilation, and A/C (HVAC) system; determine necessary action.

A7.D.3

P-2

NATEF Task Area A-7 Heating, Ventilation, and Air Conditioning SystemsD. Operating Systems and Related Controls Diagnosis and Repair

Inspect and test A/C-heater control panel assembly; determine necessary action.A7.D.4

P-3

NATEF Task Area A-7 Heating, Ventilation, and Air Conditioning SystemsD. Operating Systems and Related Controls Diagnosis and Repair

Inspect and test A/C-heater control cables, motors, and linkages; perform necessary action.

A7.D.5

P-3

NATEF Task Area A-7 Heating, Ventilation, and Air Conditioning SystemsD. Operating Systems and Related Controls Diagnosis and Repair

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

A7.D.6

P-1

NATEF Task Area A-7 Heating, Ventilation, and Air Conditioning SystemsD. Operating Systems and Related Controls Diagnosis and Repair

Identify the source of A/C system odors.A7.D.7

P-2

NATEF Task Area A-7 Heating, Ventilation, and Air Conditioning SystemsD. Operating Systems and Related Controls Diagnosis and Repair

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

A7.D.8

P-2

NATEF Task Area A-7 Heating, Ventilation, and Air Conditioning SystemsE. Refrigerant Recovery, Recycling, and Handling

Perform correct use and maintenance of refrigerant handling equipment according to equipment manufacturer’s standards.

A7.E.1

P-1

NATEF Task Area A-7 Heating, Ventilation, and Air Conditioning SystemsE. Refrigerant Recovery, Recycling, and Handling

Identify and recover A/C system refrigerant.A7.E.2

P-1

NATEF Task Area A-7 Heating, Ventilation, and Air Conditioning SystemsE. Refrigerant Recovery, Recycling, and Handling

Recycle, label, and store refrigerant.A7.E.3

P-1

NATEF Task Area A-7 Heating, Ventilation, and Air Conditioning SystemsE. Refrigerant Recovery, Recycling, and Handling

Evacuate and charge A/C system; add refrigerant oil as required.A7.E.4

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