?Disassemble appliances so that problems can be diagnosed and repairs can be made. ?Trace electrical circuits, following diagrams, and conduct tests with circuit testers and other equipment to locate shorts and grounds. ?Service and repair domestic electrical or gas appliances, such as clothes washers, refrigerators, stoves, and dryers. ?Replace worn and defective parts such as switches, bearings, transmissions, belts, gears, circuit boards, or defective wiring. ?Reassemble units after repairs are made, making adjustments and cleaning and lubricating parts as needed. ?Record maintenance and repair work performed on appliances. ?Provide repair cost estimates, and recommend whether appliance repair or replacement is a better choice. ?Maintain stocks of parts used in on-site installation, maintenance, and repair of appliances.