Dishwasher Noises and What They Mean

When you’re expecting your dishwasher to work properly without any hassle, it can be stressful to hear strange noises as it’s running through the cycle. An unexpected repair may require washing your dishes by hand, or hiring a professional to fix it.


So it helps to be familiar with dishwasher noises and what they mean, so you can address the issue as soon as possible and help extend the life of your dishwasher.


What The Noises Coming From Your Dishwasher Mean

1. Rushing, swishing water and humming sounds

As the dishwasher runs through the cycle, you can expect to hear noises coming from it. You’ll normally hear your dishwasher rushing, swishing water and humming while it’s running.


The rushing sounds indicate that the dishwasher is filling and cleaning. During the rinse cycles and the main wash, you’ll hear a swishing sound as the dishwasher sprays water around inside the tub.


The appliance’s motor may also make humming sounds. Usually, it indicates the fan cooling the main pump motor is rotating, or your disposer is grinding up food waste. These humming sounds are normal and shouldn’t make you worry.

2. Loud, buzzing sounds

If your dishwasher is abnormally noisy, it warrants a thorough investigation.


A loud, buzzing sound can mean a glass has been broken, and the pump intake was lodged with shards or accumulated hard plastic pieces. If this is the case, just open the pump intake and clean it. It should fix the clog.


Alternatively, the buzzing sounds can be due to the dry pump seal, which is often the case if your dishwasher is new. Pouring water onto the bottom of the dishwasher should eliminate the problem.

3. Banging sounds

A water hammer issue may cause your dishwasher to produce a rhythmic banging sound. This often happens when running water hits a closed valve that’s supposed to be open. This is an issue best tackled by professionals.

4. Rattling or knocking sounds

These sounds can often be attributed to an item or dish that isn’t secured in place, often due to incorrect loading.


When the spray arms are hitting the dishes or utensils, you might hear rattling or knocking sounds coming from the dishwasher. You can give the spray arms more space to move by rearranging the dishes.

5. High-pitched noise

If your dishwasher is making a high-pitched noise, this usually means that the bearings on its circulation pump are worn out.


The pump may also need to be replaced due to clogs or residue build-up in the system.

Let’s get your dishwasher up and running again

Dishwasher problems? There’s never a good time for your dishwasher to stop working properly. We understand how this can disrupt your daily routine, and risk washing your dishes by hand. Contact a Good Guy today and let’s get your dishwasher up and running in no time.


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