Is it a new dish washer or existing installed one? Is it the only thing on the circuit or is that breaker feeding more appliances? Check the amp rating on the dishwasher and compare it to the breaker size.
If you have other appliances on the same circuit, try turning everything off except the dishwasher. If you're not sure if the breaker feeds other appliances, maybe you or someone you know can do an amp draw test on the wires coming from the breaker.
If the dishwasher is the only thing on that circuit and the amp draw of the dishwasher is less than the breaker size, you may have a bad motor in the dishwasher or a bad breaker in the panel.
Dave
July 2007