In this role, you will install, service, or repair heating and air conditioning systems in residential or commercial establishments, repair appliances and installation of new equipments such as Washer and Dryer, Refrigerator, Oven and other household appliances. Repair or service heating, ventilating, and air conditioning (HVAC) systems to improve efficiency, such as by changing filters, cleaning ducts, or refilling non-toxic refrigerants.