Heating, ventilation and air conditioning (HVAC) POMEC technicians install, maintain, and repair indoor air quality systems, such as air conditioners. This may include performing warranty services and emergency repairs. This may also include assisting with customers' queries... technician will check the circuits, safety controls, drain line, condensate pump, and all caps and valves as well. Electrical components will be inspected for signs of wear or damage and replaced to prevent sparking or failure. He will check that your outdoor unit is level for optimum performance.