Bosch Dishwasher Noise- How to Fix

Bosch dishwasher
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The Bosch dishwashers might be noisy when you turn them on for use. Sometimes the noises can be normal, while other times are not normal in that they may indicate damage to the dishwasher.

Fixing the Bosch dishwasher problems is challenging. The reason being is because the dishes themselves might cause noises from the dishwasher. Before concluding any noise coming from the dishwasher, ensure that you are sure you are not complaining about the noises of the dishes or the silver clanging in the dishwasher.

Causes of noise in a Bosch dishwasher

bosch dishwasher noise

Sometimes when you put the dishes in the dishwasher, you may notice some noises that are not usual when you turn it on. The following are the causes of the noise in the dishwasher.

The drain pump

dishwasher drain pump

The drain pump is an essential part of the dishwasher that empties the dirty water before and after cleaning. When the dishwasher is turned on, the dirty water accumulates at the bottom of the washer then it is pumped out. At the same time, the dishwasher is filled with clean water, ready for another cleaning cycle.

If you notice that the dishwasher is making abnormal noises during the wash cycle, the following might be the cause.

There might be strange objects in the pump chambers that are hitting the impeller of the pump.

Recirculation pump problem

A strange noise in the dishwasher during a wash cycle indicates a problem with the recirculation pump. The recirculation pump is used to push back the water at the bottom of the washer. The following are the causes of noise in the recirculation pump.

Get this recirculation pump from Amazon.

When your glasses break, they show that some broken glasses are circulating the recirculation pump. Debris in the washer that is hitting the pump impeller in the pump chambers.

Noises in the dishwasher

Different types of noises are found in the dishwasher. Some of those noises are normal, while others are abnormal. Below are some of the noises produced by the dishwasher and how to fix them.

1. Clicking and grinding noises

Some models of the dishwasher that have a timer and electronic controls make a clicking sound when the washing cycle is in progress. The noises are mostly produced when the dishwasher is changing the washing cycles. The clicking sounds are very normal, and therefore no need to worry about them.

2. Humming noises

The humming noises in a dishwasher are very normal as the motor produces them during the normal operation of the washer. The humming sound may be caused by the fan’s rotation that cools the main pump and the operation of the drain pump. Again, when the soft food disposer is grinding the food, it will produce humming noises.

3. Snapping noises

The dishwasher will fill and drain so many times when washing and rinsing the dishes. Every time the washer starts to drain, the solenoid gets energized, leading to a snapping sound. The sound will be produced many times during the cycle as long as the water is drained. The noise is not produced in all models of dishwashers as not all of them have the drain solenoid.

Again, the snapping sound is always produced by the dishwashers when the detergent cup opens. When it opens, it hits the door producing a snap. The on-flip detergent cups always open at an angle of 90 degrees during the wash cycle. When the washing cycle is finished, the cup will open fully, producing a snapping sound. In some other models, snapping will be heard when opening and closing the dishwasher.

4. Swishing noise

The swishing sound in the dishwasher is produced during the main wash and the rinse cycles when the water is sprinkled around the tub.

5. Whining sounds

The whining sound is produced by the dishwasher’s motor during normal operation when it’s spinning.

6. Beeping noises

These noises always occur when you open the dishwasher in the middle of the cycle. To eliminate this, ensure that you close the door and switch on the dishwasher to resume the washing.

7. Rattling sounds

There is always a rattling sound in the dishwashers during the washing cycle. The water action on the dishes causes them to rattle. The plastic lightweight utensils will be forced out of the washer due to the rattle. The rattling noise from the dishes is difficult to differentiate from the motor noises.

To get the noise, one needs to run the dishwasher without the dishes. If you don’t hear the rattle, it means you are supposed to consult the user guide that came with the washer.

8. Knocking and thumping noises

The knocking noise is produced when the spray arm in the dishwasher hits something inside the washer. For example, the arm may hit the dishes as it sprays water on them. To avoid this, ensure that you arrange the utensil in the washer correctly. In addition to that, make sure that the dishes are not too many in the washer per cycle to ensure that the spray arms can rotate freely.

9. Squeaking pump noise

The squeaking noises occur when the dishwasher is used when dry. It mostly occurs when the dishwasher is new since it has never been used before.  Again the squeaking sound is produced when the dishwasher is run for a long time when not being used.

When water is added to the bottom of the dishwasher, the noise goes away since the water acts as a lubricant to the pump, keeping them quiet.

10. Grinding noises

These are noises caused when the circulation pump is running and there is no water in the washer.

11. Banging and rattling of the pipes

The sounds are produced when there is an issue with the water hummer. To fix this, ensure that you call a plumber to install an anti-hammer device.

12. Pausing noises during a drain

During each drain, it is a must that the dishwasher will start and stop. The starting and stopping ensure that the food waste is pumped out of the washer completely. This pausing of the dishwasher is normal, and therefore that should not be a big issue.

Frequently asked questions:

How is the pump in the dishwasher cleaned?

  • Make sure that you disconnect the dishwasher from the power supply.
  • Take out the rank of the dish from the washer
  • Take out the lower spray arm of the dishwasher.
  • The next step is removing the screen under the sprayer arm.
  • Loosen the screws under the housing of the pump and disconnect the pump.


It is normal for the dishwashers to make noise during their operation since they have components. The water hissing as it flows through the inlet fill valve is normal, and one should not worry about them. However, if the sound becomes too loud and strange, take action because that may indicate the failure of the washer components. Some of these issues could be the drain pump, filters, or even the motor.

Hopefully, the above article has helped you know the kind of noises produced by the dishwasher and whether they are normal—the causes of the abnormal sounds and how to troubleshoot them. If you cannot fix the noise problem in your dishwasher, it is advisable to consult a professional technician to fix it before it becomes worse.

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