Inspects, repairs and maintains all HVAC controls, machinery, fixtures and equipment including: electrical controls, refrigerant piping, valves, connections, fittings and couplings, chilled and hot water pumps, air handlers, refrigeration equipment, air compressors and air dryers, thermostats and humidistats on all HVAC equipment, whether pneumatic, electrical or electronic, de-scales tubing, cuts and thread pipe and makes pipe and electrical connections.