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49-9021.00 · Task explorer

Heating, Air Conditioning, and Refrigeration Mechanics and Installers: reported tasks and exploration worksheet

Install or repair heating, central air conditioning, HVAC, or refrigeration systems, including oil burners, hot-air furnaces, and heating stoves.

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This source lists 30 tasks, including 30 marked Core and 0 marked Supplemental. Labels and dates are retained below. Employers can combine or divide these responsibilities differently; explore the task itself before assuming it belongs in every version of the role.

Task source dates: 08/2026.

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30 tasks shown

Core · Task 23554 · 08/2026 · Incumbent

Discuss heating or cooling system malfunctions with users to isolate problems or to verify that repairs corrected malfunctions.

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Core · Task 23552 · 08/2026 · Incumbent

Test electrical circuits or components for continuity, using electrical test equipment.

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Core · Task 23553 · 08/2026 · Incumbent

Repair or replace defective equipment, components, or wiring.

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Core · Task 23561 · 08/2026 · Incumbent

Lay out and connect electrical wiring between controls and equipment, according to wiring diagrams, using electrician's hand tools.

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My example, evidence or question

Core · Task 23575 · 08/2026 · Incumbent

Schedule work with customers and initiate work orders, house requisitions, and orders from stock.

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Core · Task 23574 · 08/2026 · Incumbent

Estimate, order, pick up, deliver, and install materials and supplies needed to maintain equipment in good working condition.

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Core · Task 23556 · 08/2026 · Incumbent

Install, connect, or adjust thermostats, humidistats, or timers.

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Core · Task 23557 · 08/2026 · Incumbent

Comply with all applicable standards, policies, or procedures, such as safety procedures or the maintenance of a clean work area.

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Core · Task 23580 · 08/2026 · Incumbent

Repair or service heating, ventilating, and air conditioning (HVAC) systems to improve efficiency, such as by changing filters, cleaning ducts, and refilling non-toxic refrigerants.

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Core · Task 23581 · 08/2026 · Incumbent

Test pipes, lines, components, and connections for leaks.

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Core · Task 23560 · 08/2026 · Incumbent

Braze or solder parts to repair defective joints and leaks.

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Core · Task 23568 · 08/2026 · Incumbent

Recommend, develop, or perform preventive or general maintenance procedures, such as cleaning, power-washing, or vacuuming equipment, oiling parts, or changing filters.

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Core · Task 23572 · 08/2026 · Incumbent

Keep records of repairs and replacements made and causes of malfunctions.

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Core · Task 23563 · 08/2026 · Incumbent

Record and report time, materials, faults, deficiencies, or other unusual occurrences on work orders.

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My example, evidence or question

Core · Task 23565 · 08/2026 · Incumbent

Adjust system controls to settings recommended by manufacturer to balance system.

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My example, evidence or question

Core · Task 23564 · 08/2026 · Incumbent

Perform mechanical overhauls and refrigerant reclaiming.

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My example, evidence or question

Core · Task 23566 · 08/2026 · Incumbent

Install expansion and control valves, using acetylene torches and wrenches.

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Core · Task 23562 · 08/2026 · Incumbent

Inspect and test systems to verify system compliance with plans and specifications or to detect and locate malfunctions.

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Core · Task 23555 · 08/2026 · Incumbent

Connect heating or air conditioning equipment to fuel, water, or refrigerant source to form complete circuit.

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Core · Task 23570 · 08/2026 · Incumbent

Mount compressor, condenser, and other components in specified locations on frames, using hand tools and acetylene welding equipment.

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Core · Task 23558 · 08/2026 · Incumbent

Study blueprints, design specifications, or manufacturers' recommendations to ascertain the configuration of heating or cooling equipment components and to ensure the proper installation of components.

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Core · Task 23559 · 08/2026 · Incumbent

Install auxiliary components to heating or cooling equipment, such as expansion or discharge valves, air ducts, pipes, blowers, dampers, flues, or stokers.

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Core · Task 23579 · 08/2026 · Incumbent

Install or repair self-contained ground source heat pumps or hybrid ground or air source heat pumps to minimize carbon-based energy consumption and reduce carbon emissions.

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Core · Task 23573 · 08/2026 · Incumbent

Install or repair air purification systems, such as specialized filters or ultraviolet (UV) light purification systems.

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Core · Task 23576 · 08/2026 · Incumbent

Supervise and instruct assistants.

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Core · Task 23577 · 08/2026 · Incumbent

Lay out reference points for installation of structural and functional components, using measuring instruments.

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Core · Task 23571 · 08/2026 · Incumbent

Measure, cut, thread, or bend pipe or tubing, using pipe fitter's tools.

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Core · Task 23567 · 08/2026 · Incumbent

Install dehumidifiers or related equipment for spaces that require cool, dry air to operate efficiently, such as computer rooms.

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Core · Task 23578 · 08/2026 · Incumbent

Lift and align components into position, using hoist or block and tackle.

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Core · Task 23569 · 08/2026 · Incumbent

Cut or drill holes in floors, walls, or roof to install equipment, using power saws or drills.

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Make the shortlist useful

Choose one to three activities that tell you something different about the work. Avoid selecting several ways of describing the same interest.
For each, write an example you can discuss or a question that would change your understanding of the role.
Keep source task IDs with your notes so you can return to the same description. Do not include private employer or customer information.

The exported worksheet distinguishes the reported task from your own notes. It supports exploration, not a hiring decision or a validated assessment.

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Source and practice material

Occupational context uses the O*NET® 31.0 Database from the U.S. Department of Labor, Employment and Training Administration, under CC BY 4.0. View the occupation.

Skill Workbench selected and adapted the occupational information and added its own fictional cases, calculations, guidance and worksheets. USDOL/ETA has not approved, endorsed or tested these additions. O*NET® is a trademark of USDOL/ETA.