Sears / Kenmore Dishwashers are manufactured by Frigidaire, GE, Maytag, and Whirlpool. Here is how to tell which manufacturer made your dishwasher. The manufacturer is determined by the first three numbers of your model number. Here is an example of your model number: 123.xxxxxxxxx. Notice the model number begins with a 3 number prefix followed by a series of 5,6, or 7 more numbers. If your model number begins with: