Mar 28, 2024  
2017-2018 
    
2017-2018 [ARCHIVED CATALOG]

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AUT 214W - Heating/Air Conditioning Service

Credits: 5


Studies passenger car and light truck heating and air conditioning terminology, operation and diagnosis. Develops skills in diagnosis and repair of the heating and air conditioning system components.   

Prerequisite(s): AUT 100  and AUT 108  each with a minimum grade of “C” (2.0)
Corequisite(s): AUT 210W , AUT 212W  
Lecture Hours: 50 Lab Hours: 50
Meets MTA Requirement: None
Pass/NoCredit: No

Outcomes and Objectives 1.    Diagnose and repair A/C System.  Complete 95% of Priority 1, 80% of Priority 2, and 50% of Priority 3 NATEF tasks as listed below.

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

     B.          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

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

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

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

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

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

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

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

2.    Diagnose and repair refrigeration system compressor and clutch.  Complete 95% of Priority 1, 80% of Priority 2, and 50% of Priority 3
       NATEF tasks as 
listed below.

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

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

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

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

3.    Diagnose and repair refrigeration system evaporator, condenser, and related components.  Complete 95% of Priority 1, 80% of Priority
       2, and 50% of Priority 3 NATEF tasks as listed below.

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

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

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

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

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

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

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

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

4.    Diagnose and repair heating, ventilation, and engine cooling systems. Complete 95% of Priority 1, 80% of Priority 2, and 50% of Priority
       3 NATEF
tasks as listed below.

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

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

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

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

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

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

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

     H.         Inspect and test electric cooling fan, fan control system and circuits; determine necessary action  P-2

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

     J.          Remove and reinstall heater core.  P-3

5.    Diagnose and repair operating systems and related controls.  Complete 95% of Priority 1, 80% of Priority 2, and 50% of Priority 3 NATEF
       tasks as listed 
below.

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

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

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

     D.          Diagnose malfunctions in the vacuum and mechanical components and controls of the heating, ventilation, and A/C (HVAC) system;
                  determine necessary action.  P-2

     E.          Inspect and test A/C-heater control panel assembly; determine necessary action.  P-3

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

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

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

6.    Recover, recycle, and handle refrigerant.  Complete 95% of Priority 1, 80% of Priority 2, and 50% of Priority 3 NATEF tasks as listed
       below.
    

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

     B.          Identify (by label application or use of a refrigerant identifier) and recover A/C system

                  refrigerant.  P-1

     C.          Recycle refrigerant.  P-1

     D.         Label and store refrigerant.  P-1

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

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



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