Performs periodic inspection to locate and determine cause of equipment malfunctions; conducts maintenance program to prevent failure of such equipment as centrifugal compressors, electrical controls, evaporative condensers, pumps, fans, and heating equipment; charges air-conditioning systems with refrigerant; checks and tests for leaks; sets and adjusts controls and regulators; fabricates, assembles, and installs ductwork; overhauls equipment. Your mission, should you choose to accept: Installs, services, modifies, rebuilds, and repairs air-conditioning and refrigeration systems and equipment in an industrial or commercial establishment in accordance with applicable building codes and safety regulations.