The part(s) or condition(s) listed below for the symptom Dishwasher making noise are ordered from most likely to least likely to occur. Check or test each item, starting with the items at the top of the page.
The water inlet valve opens to allow water to enter the dishwasher. When it is new, the water inlet valve is very quiet during operation. Over time, the diaphragm inside the valve deteriorates and deforms. This deformation interacts with the water rushing in and can produce a loud vibration, buzzing, squealing, or other noises. If the dishwasher is loud during the filling cycle, replacing the water inlet valve may solve the problem.