AURETU104 — Diagnose and repair air conditioning and HVAC components

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What an assessment for AURETU104 must cover

42 assessable components: 5 elements (21 performance criteria), 1 performance evidence and 14 knowledge evidence requirements, plus 6 foundation skills. An audit-defensible tool maps every question and task back to these — that mapping is the coverage matrix Auditori generates alongside the assessment.

Elements & performance criteria

1 Prepare to diagnose and repair air conditioning and HVAC system

1.1Identify job requirements from workplace instructions
1.2Identify required information for diagnosis activity
1.3Select diagnostic options and source testing strategy to identify cause of fault using workplace and manufacturer procedures
1.4Identify hazards and environmental issues associated with diagnose and repair activity, assess potential risks and implement control measures in line with workplace policies and procedures
1.5Identify tools and equipment required for testing strategy and establish serviceability according to workplace procedures

2 Diagnose air conditioning and HVAC system

2.1Carry out diagnostic tests set out in testing strategy according to manufacturer and workplace procedures, and workplace health and safety requirements
2.2Identify cause of fault through examination of diagnostic test results
2.3Confirm and report cause of fault according to workplace procedures
2.4Develop and report recommendations for necessary repairs according to workplace procedures

3 Operate recovery equipment

3.1Identify vehicle refrigerant with a refrigerant identifier or analyser
3.2Weigh recovery cylinder and record available capacity and tare weight of cylinder
3.3Connect recovery equipment to vehicle according to manufacturer specifications, workplace procedures, workplace health and safety and environmental requirements
3.4Recover refrigerant and transfer into designated recovery cylinder using recovery equipment according to manufacturer specifications, workplace procedures, and workplace health safety and environmental requirements

4 Repair air conditioning and HVAC system

4.1Identify required information for repair activity
4.2Identify required repair tools, equipment and materials required for repair activity and establish serviceability according to workplace procedures
4.3Carry out repairs according to workplace and manufacturer procedures, manufacturer specifications, workplace health and safety and environmental requirements
4.4Recharge system with required refrigerant gas according to manufacturer specifications, workplace procedures and workplace health and safety and environmental requirements
4.5Carry out post-repair testing according to workplace procedures, workplace health and safety and environmental requirements

5 Complete work processes

5.1Conduct final inspection according to workplace procedures and confirm vehicle is ready for use
5.2Clear work area and dispose of or recycle materials according to workplace procedures
5.3Complete Australian Refrigeration Council accredited (ARCtick) service decal sticker and workplace documentation according to workplace procedures.

Performance evidence

diagnose and repair a fault in the air conditioning and heating, ventilation and cooling (HVAC) systems of two different vehicles or machinery, in which the work must involve removing, refitting or replacing two of the following: condenser, evaporator, expansion valve, compressor, heater box; remove, refit or replace two different types of refrigerant.

Knowledge evidence

methods to locate and interpret information required to diagnose and repair air conditioning and HVAC systems, including: information provided by customers and supervisors; air conditioning and HVAC system manufacturer specifications; Australian automotive code of practice: control of refrigerant gases during manufacture, installation, servicing or de-commissioning of motor vehicle air conditioners
workplace procedures required to diagnose and repair air conditioning and HVAC systems, including: establishing the serviceability of tools and equipment; documentation procedures; housekeeping procedures, including: examination of tools and equipment; storage of equipment; identification, tagging and isolation of faulty equipment; safe disposal of materials; recycling procedures
workplace health and safety (WHS) requirements relating to diagnosing and repairing air conditioning and HVAC systems, including procedures for: working with refrigerants at boiling point given risk of frostbite; working with system lubricants, including carcinogenic oils; identifying refrigerant and oil type, including: service decal sticker; testing refrigerant; types and location of service ports; handling, storing and transporting refrigerant cylinders and recovery cylinders, including: pressure ratings; pressure relief devices; outlet connection type; selecting and using personal protective equipment (PPE); emergency procedures and incident management requirements and procedures; handling flammable refrigerants; identifying and using fire safety equipment
procedures for recovering automotive refrigerant, including: testing refrigerant to determine its type; connecting manifold and gauge set and recovery unit, including types and location of service ports; identifying recovery cylinder suitable to the refrigerant; operating recovery unit, including weighing recovery cylinder before and after recovery; disconnecting and storing recovery unit and cylinder
system performance testing, including: using manifold gauges and thermometers to check system pressures and vent temperatures; checking blower fan output; checking engine fan output; checking filters
environmental requirements relating to servicing air conditioning and HVAC, including procedures for: preventing loss of refrigerant to the atmosphere; handling materials and refrigerant recovery equipment
air conditioning and HVAC system principles, including: heat transfer principles, including convection, conduction and radiation; functions of the following air conditioning components: compressor, condenser, receiver-drier, evaporator, blower fan, refrigerant; functions of the following heating components: radiator, thermostat, radiator and heater hoses, heater tap, heater box; single zone and multi- zone vehicle layouts
purpose and operation of air conditioning and HVAC systems and components, including: high pressure and low pressure sides of air conditioning systems; compressors, including: axial type, including variable capacity compressors; scroll type; vane type; electromagnetic clutches; condensers; receiver-dryer, including filters and desiccants; expansion valves, including capillary tube; evaporator; thermostat; refrigerants, including R12, R134, R1234yf and hydrocarbon refrigerants; compressor oils; air conditioner and heating controls, including levers and ducting; air conditioner and heating electrical circuits and sensors, including: high and low pressure switches; pressure relief valves; temperature sensors; climate control systems
diagnostic testing procedures for air conditioning and HVAC systems, including: accessing and interpreting scan tool system data, including: diagnostic trouble codes (DTCs); live data; freeze frame data; waveforms; using diagnostic flow charts; using manifold gauges on systems with different refrigerants, including analysis of high and low pressure readings in conjunction with temperature probes
testing electrical systems, including procedures for: accessing electrical terminals and using test probes without damaging connectors, fuse holders or wiring; resistance and voltage drop tests; open and short circuit tests; checking shorts to signal, power circuits and grounds
repair procedures for air conditioning and HVAC systems, including procedures for: using manifold gauges to discharge, evacuate and charge system refrigerants; removing and replacing system components
post-repair testing procedures for air conditioning and HVAC systems, including procedures for checking for: refrigerant leaks; heater core and system water coolant leaks; ambient temperature; centre vent temperature; condenser and suction line temperature; manifold gauge pressure readings
static and dynamic performance tests of air conditioning and HVAC systems, including checking: ambient temperature; vent temperature; condenser and suction line temperature
procedures for completing ARCtick service decal sticker, including: name of service organisation; ARCtick business authority number; quantity of refrigerant added; refrigerant and oil type; service date; technician name and licence number

Foundation skills

Learning: Locates required sources of information efficiently Develops a sequenced plan for a specific task
Reading: Interprets text, symbols and wiring diagrams relating to diagnostic and repair information from manufacturer specifications and workplace instructions and procedures
Oral communication: Clarifies instructions Obtains information from customers and supervisors
Numeracy: Matches refrigerant types and identification numbers to workplace instructions, parts lists, manufacturer specifications, code of practice and regulatory requirements Interprets weight measurements, including tare and gross weights Interprets readings on pressure gauges Measures temperatures and pressures and uses mathematical operations, to calculate deviations from manufacturer specifications
Planning and organising: Plans own work requirements Prioritises actions to achieve required outcomes Ensures tasks are completed within workplace timeframes
Technology: Uses specialised equipment.

Unit content sourced from training.gov.au — © Commonwealth of Australia, licensed under CC BY 4.0. Auditori is not affiliated with the Department of Employment and Workplace Relations.

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Questions about assessing AURETU104

What does an assessment tool for AURETU104 need to cover?

To satisfy the Principles of Assessment and Rules of Evidence, an assessment for AURETU104 needs to address all 42 unit components: 5 elements with 21 performance criteria, 1 performance evidence requirements, 14 knowledge evidence requirements, and the foundation skills. A coverage matrix mapping each question and task to these components is what an auditor looks for.

How does Auditori generate an assessment tool for AURETU104?

Auditori pulls the current release of AURETU104 from training.gov.au and generates a complete package: candidate assessment, assessor guide with model answers and observation criteria, and a coverage matrix mapping every component. A suitably qualified person then reviews and approves the draft in a built-in workflow — consistent with ASQA's guidance on AI use in VET — before export as branded PDF and editable Word.

Is the first assessment tool really free?

Yes. Every new account includes one free credit — enough to generate the complete assessment tool for AURETU104 — with no card and no subscription required. After that it's pay-as-you-go per unit.

Can I check my existing AURETU104 assessment instead of generating a new one?

Yes — upload your existing assessment or learner guide and Auditori maps it against every element, performance criterion, PE and KE of AURETU104, showing exactly what's covered and what's missing. Mapping costs a quarter of a credit.

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