Maintains and repairs light fixtures, receptacles and switches; Replaces light bulbs; Maintains generators and motors; Oils and cleans motors; Troubleshoots and makes electrical repairs not requiring a license; Maintains and makes minor repairs to various types of heating, refrigeration and air-conditioning equipment, such as components, pumps, fans, humidifiers, electric motors, and heat exchangers. Essential Functions Performs carpentry work in the construction or renovation of buildings or additions to existing structures; Erects and maintains scaffolds, sheds, forms, frames, fences and other structures; Alters and repairs doors, floors, partitions, stairways, windows, screens, and other fixtures; Fits and glazes glass in windows and doors; Maintains and repairs roofs.