If you need help finding the model number of the appliance you are working, on here are some common locations manufactures place model numbers. Note if you need to order a part you will need the full model number not the partial number provided on your owners manual.
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The model number on refrigerators is going to be either in the fresh food section on the top right hand side near the door or at the bottom behind the kick plate (the kick plate is the grill at the bottom near the floor, just pull it to get it off).
Top Freezer Refrigerator
Bottom Freezer Refrigerator
The model number on most ranges is in the storage drawer or in the oven door.
The model number on most washers is either under the lid (maybe behind the lid) or on the back right at the top (should be able to see it without pulling it out). Some washers have a tag on the side so you may have to move it out to see it.
Top Load Washer
Front Load Washer
The model number on most dryers is either in the door or on the back at the top (should be able to see it without pulling it out). Some dryers have a tag on the side so you may have to move it out to see it.
The model number on all dishwashers is where the door seals on the left hand side.