Heating, air
conditioning, and refrigeration mechanics and installers typically do
the following: Use blueprints or design specifications to install or
repair HVACR systems. Inspect and maintain customers' HVACR systems. Test
individual components to determine necessary repairs. Repair or replace worn or
defective
A machine is
a mechanical structure that uses power to apply forces and control the movement to perform an intended action. They can also include computers and
sensors that monitor performance and plan movement, often
called mechanical systems.