Your model number and serial number will be listed in the manual, but most people don’t keep their home appliance manuals. Of course, to do this, you need to find those numbers. These numbers will help you track down the appliance manual and replacement parts catalog and identify the exact part-numbers you need for the repair. To do this, the best way is to know the model and the serial number of your appliance. You need parts that fit into your appliance with all the same connections and ratings as the original components. One of the most important steps in any repair is getting the right replacement parts.