The 3 most common part(s) or condition(s) which cause the symptom Dishwasher making noise are listed below starting with the most likely. Check or test each item and watch any available videos.
RepairClinic Item # 2813258
If the dishwasher is loud during operation, the drain pump might be defective or might have some debris in it. This is a common problem.
RepairClinic Item # 1875706
If the dishwasher is loud the motor bearings, drain impeller or wash impeller might have worn out. All three of these components are part of the pump and motor assembly. It may be possible to replace one of the impellers, but the motor bearings cannot be repaired. In that case the pump and motor assembly will need to be replaced.
RepairClinic Item # 3015273
The water inlet valve is an electrically controlled water valve. When it is new, the water inlet valve is very quiet. Over time, the diaphragm inside the valve deteriorates and deforms. This deformation interacts with the water rushing in and can cause 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.