Employees also maintain and repair laundry and kitchen equipment, including retherms, beverage machines, ice makers, washers, and dryers; perform minor carpentry repairs; maintain and repair door locking devices and associated hardware; troubleshoot and repair electronic locks; and perform minor concrete, flooring, wall, plastering, asphalt, and painting repairs. Additional responsibilities include routine maintenance, repair, lubrication, and adjustment of water valves; replacement of ceiling tiles and grid components; changing air-conditioning filters and cleaning coils; and maintenance and repair of gate motors, relays, contactors, chain drives, fencing, and related equipment.