While top brand dishwashers claim to be quieter than others, all dishwashers must make some sound during operation; all those moving parts and spraying water are bound to emit small noises. If you listen carefully to your dishwasher, you'll hear a reassuring hum or faint spraying sounds that mean the dishes are being sanitized.

If you suddenly hear sounds that are louder than normal or strange noises coming from your dishwasher as its operating, there could be something wrong. These noises may alert you that it's time to have your dishwasher repaired. Take a look at these 4 reasons why your dishwasher could be making weird noises, and what you can do about it.


If your dishwasher is not firmly attached to the floor or counter, it may make a strange noise as it vibrates or knocks against its surroundings during a cycle. When you open the dishwasher door, the entire appliance may even tilt forward a bit, indicating it is not attached.

To remedy this, it's usually a matter of re-tightening a few loosened screws in their mounting brackets. If the screws are missing or stripped, replace them with newer, slightly larger screws and fasten the brackets to the underside of the counter. This helps prevent damage to the counter.

If the screws are too badly stripped, or you have granite counters that cannot be drilled into, you can attach the dishwasher to the floor with a floor mounting kit.


If your dishwasher is equipped with a food disposer, it will make a noise as it grinds up soft food, just like the garbage disposal in your sink. However, it cannot chop up pieces hard food, which will remain in the dishwasher until they are removed.

If you hear a loud grinding sound, it's only a matter of removing whatever is stuck down by the chopping blades. If the noise still continues after you have pulled out pieces of stray food, the chopper blade might be damaged from attempting to cut those bits of hard food


Powerful jets of water inside your dishwasher force dirty food off of your dishes to clean them, and these jets of water are strong enough to rattle dishes together. A knocking or clinking sound may indicate that dishes are being knocked together because they are stacked incorrectly or placed too close together on the racks inside.

Check your dishwasher instruction manual for how to stack dishes inside your washer correctly. Dishwashers clean most effectively when dirty surfaces face the interior of the washer where the sprays of water can reach them. Make sure dirty dishes have enough space between each other so water streams can reach the dirty surfaces.


Many moving parts inside your dishwasher, including spray arms and motors, are capable of wearing out and breaking. When this happens, there might be weird noises. For example, a broken water inlet valve will cause the dishwasher pump to be loud due to low water levels. The wash pump motor will also get louder if it is wearing out. If your dishwasher is making unusual sounds, it may be time to have some parts replaced, which is usually less expensive than purchasing a brand new dishwasher.

Weird noises could be coming from a broken part inside the dishwasher, foreign objects that cannot be disposed of by the chopper blade, dishes that are knocking together or simply because the appliance is not completely attached to the counter or floor. If you're need a new part to get your dishwasher running quietly again, visit APD Appliance Parts Distributor.