These systems are in residential, commercial, industrial, and other buildings. Mechanics work on many different systems. These range from simple heating systems in homes to large, complex systems in factories, schools, and other commercial buildings. Heating, air-conditioning, and refrigeration systems are made of many different components. Among these are mechanical, electrical, and electronic parts.
Mechanics maintain systems and diagnose problems.
They set up motors, compressors, fans, pipes, and pumps. They also install air ducts, thermostats, and switches. They then connect the equipment to power sources. They adjust system controls and check the entire system to make sure it works. They may keep records and write reports.