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

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

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.

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

Connect heating or air conditioning equipment to fuel, water, or refrigerant source to form complete circuit.; Install, connect, or adjust thermostats, humidistats, or timers.; Install auxiliary components to heating or cooling equipment, such as expansion or discharge valves, air ducts, pipes, blowers, dampers, flues, or stokers.; Mount compressor, condenser, and other components in specified locations on frames, using hand tools and acetylene welding equipment.

Install, connect, or adjust thermostats, humidistats, or timers.; Adjust system controls to settings recommended by manufacturer to balance system.

Repair or replace defective equipment, components, or wiring.; Install or repair air purification systems, such as specialized filters or ultraviolet (UV) light purification systems.; 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.; 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.

Repair or replace defective equipment, components, or wiring.; Perform mechanical overhauls and refrigerant reclaiming.; 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.

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

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

Repair or replace defective equipment, components, or wiring.

Install dehumidifiers or related equipment for spaces that require cool, dry air to operate efficiently, such as computer rooms.; Install or repair air purification systems, such as specialized filters or ultraviolet (UV) light purification systems.; 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.

Braze or solder parts to repair defective joints and leaks.

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

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

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

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

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

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

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

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

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

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