These blueprints are used to install motors, compressors, condensing units, evaporators, and other parts. They connect the equipment to ducts, refrigerant lines, and power sources. Then they charge the system with refrigerant. Mechanics diagnose problems when systems break down. They make repairs, test parts, inspect systems, and overhaul compressors.
Mechanics conserve, recover, and recycle refrigerants.
These refrigerants are gases used in cooling systems. They must be kept from escaping into the atmosphere. Heating and cooling system mechanics sometimes repair items that were installed by other craft workers. On a large air-conditioning installation job, a variety of craft workers may do the work. This is especially true where workers are covered by union contracts.