Heating and cooling system mechanics install and repair heating, air-conditioning, refrigeration, and ventilation systems.

Mechanics read blueprints and manufacturers' manuals. For installation, they drill or cut holes in floors, walls, and roofs, place fuel and water lines, and connect wiring. They check the unit for proper operation and program controls. Heating and cooling system mechanics may also perform routine maintenance such as cleaning and oiling parts, replacing filtering, and removing dust.

If something isn't working properly, they discuss problems with customers to determine what need to be repaired. They test components such as compressors and thermostats. Heating and cooling system mechanics keep records of the repairs and replacements they make.

Heating and cooling system mechanics use a variety of tools, such as:

• Hand and power tools
• Pipe cutters and benders
• Torches
• Voltmeters
• Pressure gauges

Heating and cooling system mechanics must follow government regulations and safety procedures when installing or repairing systems. For cooling systems, refrigerants must be conserved and recycled properly.

Mechanics may choose to specialize in a specific aspect, such as solar panels, commercial refrigeration, or radiant heating systems.

Some mechanics work in pairs or teams. They may assist another mechanic or work as a supervisor.