Look inside the skin panels and you will find a service technitians manual in a plastic bag taped to the inside of the skin. This is the case for all washers and dryers, so when you call a service technitian he pulls the tech book to make repairs to your unit. These are also available on line and from the manufacturer. They provide emergency unlock sequences, wiring diagrams, parts list, error code and fault code directory, diagnostic tests, trouble shooting guide etc. So the repair technician can repair your appliance. There are just too many variables for a tech to know every machine. Parts are available on line at Sears Parts, Wal-Mart parts and Amazon. You can also go to fix ya com and get expert help from a pro.