An HVAC Technician, or a Heating, Ventilation and Air Conditioning Technician, installs and repairs various air quality systems. Their main duties include locating and diagnosing maintenance problems on equipment, conducting warranty services and quickly performing emergency repairs on certain equipment items. Installing, maintaining and repairing ventilation and air conditioning systems and equipment. Identifying maintenance risks on equipment. Diagnosing electrical and mechanical faults for HVAC systems. nstalling, maintaining, and repairing ventilation and air conditioning systems and equipment. Identifying maintenance risks on equipment. Diagnosing electrical and mechanical faults for HVAC systems. Cleaning, adjusting, and repairing systems, and performing warranty services