How To Fix A Noisy Dishwasher

A defective pump could be the reason your dishwasher is making loud noises. The function of the pump is to pressurize the spray arms and in most models it is also used to drain the water. The pump sits at the bottom of the dishwasher and typically consists of two separate compartments; one for wash or circulation and the other for drain. The circulation part of the pump will typically consist of the wash impeller and the filter components while the drain portion will consist of a drain impeller and a chopper blade or in some cases, a solenoid operated diverter. The impellers are driven by an electric motor that is attached to the bottom or side of the pump.

If your dishwasher is noisy, the cause could be a wash arm seal or bearing ring. These parts are plastic rings that support the wash arm or spray arm and that the arm rotates on. Either of these parts could be loose or be worn causing the spray arm to not function properly. Inspect both the seal and the ring and replace if required.

Check to ensure that the spray arms are turning freely and are not hitting the racks or dishes. If the arms are wobbly, then the center portion or hub of the spray arm may be worn and the spray arm will need to be replaced.