The Dishwasher Making Noise When Water Circulates

The Dishwasher Making Noise When Water Circulates

The Dishwashers were designed to make human lives easier. The days of worrying about doing dishes right after dinner with your family and friends are over. More so, using a dishwasher to washes your dishes is more hygienic than using your hands, sponge, and soap. Let me add, they also have a drying cycle that dries the dishes right after a washing cycle.

the Dishwasher
Photo Credits: Castorly Stock,

Although, dishwasher making noise when a washing cycle begins is normal, sometimes these noises can signify that there is an issue. When they make these unusual sounds, we can’t help but wonder why. 

As a result, it is not safe to assume when we hear any noise coming from the machine. We are going to look at some of the common noises, easy diagnosis and ways to fix them. 

Soon you will go back to enjoying your mealtimes with family and friends. Without worrying about having a noisy machine or the monotonous chore of doing dishes manually.

If you prefer learning by video, this article is also explained here.

Why Is The Dishwasher Making Noise?

The dishwasher will make a loud, unusual noise when the wash pump becomes defective. A defective wash pump will cause your dishwasher to have grime leftover on them after a wash cycle has been completed. You must replace a defective dishwasher pump as soon as you notice it begins to make loud noises.

A thumping sound indicates that the drain system is vibrating against the kitchen cabinet. The appliance’s wash pump, drain pump or pump motor is broken.

As earlier discussed, some dishwasher noises are not an indication of a fault. For example, the hissing sound of water running through the dishwasher’s water inlet valve, the sloshing sound of water circulating around the appliance are all normal occurrences.

Newer dishwasher models run for a long time than most of the older models, but they are more water and energy-efficient. Because of this, they also run quieter cycles.

So, when your dishwasher makes loud unusual sounds or noises, there is a problem that needs your attention. You must investigate it immediately. 

Perhaps, there is a popcorn kernel that is stuck inside the chopper blade region. Thus, producing the grinding noise, you are hearing. You may have wrongly installed the dishwasher.

There are several reasons why dishwashers make noises while running.  Luckily, some of these issues can be fixed by a fairly experienced and skilled handyman. Other problems will require the services of a professional repairman.

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What Are The Common Dishwasher Noises And What Do They Signify?

Below are some common noises a dishwasher will make:

  • Buzzing Noise
  • Thumping Noise in The Dishwasher
  • Grinding Noise
  • Humming Noise
  • Rattling Noise
  • Squealing Noise
  • Banging Noise
  • Knocking Noise
  • Swishing Noise
  • Clunking Noise
  • Snapping Noise

Buzzing Noise in The Dishwasher

Why is my dishwasher making a buzzing noise?

A dishwasher will make a buzzing noise when they are forcing water through the drain. It is a characteristic sound that signifies the soft food disposal component of the machine is functioning during a wash cycle. These buzzing sounds are normal and should be expected.

A dishwasher machine that makes an extremely loud noise sounding like a bang signifies a water hammer problem. A water hammer problem occurs when quick torrents of water make the water pipes to hits their surroundings. Inspect the machine and resolve the issue using a water hammer shock arrestor.

Thumping Noise in The Dishwasher

What causes a thumping noise in a dishwasher?

The dishwasher will make a thumping noise when its drain line constantly hits the side of the kitchen cabinet or the wall at the back. This noise will occur when you turn on the dishwasher. The primary cause of this noise is improper dishwasher installation.

The dishwasher will also make a thumping sound when the spray arms hit an object while rotating. This noise is loud, constant, and comes at a constant interval. Often time, these items are large kitchen utensils in the rack compartments.

To resolve this issue, open the dishwasher and rearrange your pans and pots. The thumping sounds is not an indication of a faulty dishwasher.

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Video: Top Reasons Dishwasher Is Noisy

This video will show you the top reasons why your dishwasher makes a lot of noise.

Grinding Noise In The Dishwasher 

Why is my dishwasher making a grinding noises?

Your dishwasher will make grinding noises when there is insufficient spraying water in the dishwasher. Examine the water inlet valve to make sure there is enough supply of water.

Should the noise persists after inspecting the inlet valve then, follow these steps:

  1. Open the dishwasher’s door mid-cycle.
  2. Wait until the steam dissipates.
  3. Pull the lower rack out.
  4. Check the machine for any stuck item(s).
  5. Remove the drain impeller. Check if there is any dirt stuck inside the chopper blade section.

Clicking Noise In The Dishwasher

What causes a clicking noise in a dishwasher? 

Your electronic dishwasher will make a clicking noise when it is running a cycle. This noise comes from the control panel or the electric timer and it is absolutely normal. Therefore, there is no cause for alarm. If the noise is however rhythmic, then an item inside the dishwasher is the cause. Turn off the dishwasher immediately and drain it completely and remove the item causing the clicking noise.

Humming Noise in The Dishwasher

What causes a humming high pitched noise in a dishwasher?

A dishwasher will make a high pitch humming noise when the electric motor attached to the dishwasher becomes faulty. A faulty pump will also cause the dishwasher to make a high pitched noise. To resolve this issue inspect the dishwasher’s filter for clogs. If that does not resolve the issue, take note of the model of your dishwasher and get a replacement motor and/or pump assembly.

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Rattling Noise in The Dishwasher

What causes a rattling noise in a dishwasher?

Rattling noise in a dishwasher is caused by improperly placed dishware or other kitchen utensils on the rack compartments. Open the machine and inspect it for any item not placed properly on the rack compartments. However, if there are no loose objects or items hitting against one another and the rattling sound is extremely loud, then the dishwasher drain pipe is faulty. 

Occasionally, this noise can happen for many other reasons connected to a malfunctioning motor. If the rattling sound is not coming from the dishware but from the motor system, run an empty dishwasher cycle. Check if the sound is still there.

Squealing Noise in The Dishwasher

Dishwasher making squealing noise?

A squealing noise from a dishwasher is caused by a faulty drain or wash pump. When the bearings on the dishwasher motor is faulty, you will notice a loud squealing noise. If this is the case, you will have to replace the dishwasher pump.

The squealing noise can also happen if you have not used the dishwasher for a long time. Add 1 quart of water below the dishwasher tub to stop the noise.

Banging Noise in The Dishwasher

What causes a banging noise in a dishwasher?

A dishwasher will make a loud banging noise when it experiences a water hammer. A water hammer is associated with a faulty water supply system. When a water hammer occurs, as the machine’s water inlet valve closes, the pressure of the water makes the water pipes to clatter.

This causes a characteristic banging sound. If your home’s having a water hammer problem, fix it with a water pressure arrestor or call a plumbing professional.

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Knocking Noise in a Dishwasher

What causes a knocking noise in a dishwasher?

Knocking noise in the dishwasher is associated with an improper loading of dishwares in the dishwasher. When you hear a constant knocking noise inside your dishwasher, it is most likely caused by a spray arm. This occurs when the spray arm hits an item inside the machine as it rotates.

To resolve this, open your dishwasher. Then adjust the items so that the spray arm can rotate freely. Switch off the power source to the machine before you open the dishwasher door.

Check out other related dishwasher articles:

Swishing Noise in The Dishwasher

what causes a swishing noise in a dishwasher?

Your dishwasher makes a swishing noise during a dishwasher cycle. This sound is the noise of water sprinkling inside the dishwasher basin during the wash or rinses cycles.

Clunking Noise in The Dishwasher

What causes a clunking noise in a dishwasher?

A dishwasher will make a clunking noise midway a wash cycle when it opens the dishwasher detergent cup. This sound usually occurs once during a wash cycle and is very normal.

Snapping Noise in The Dishwasher

What causes a snapping noise in a dishwasher?

A dishwasher makes a snapping noise when it opens its detergent cup. The dishwasher will also make a snapping noise when it begins to drain water from the machine’s interior. this will happen often all through a wash cycle.

Dishwasher machines can also make this sound when they run or when its door opens. If your machine makes this sound while it runs, it is most likely the solenoid is charging. 

The solenoid charges as the machine keep filling and draining water many times throughout the dishwasher cycle. This causes the machine to make a snapping sound. There is no cause for alarm in this case.

Also, dishwasher models with hinged detergent cup make this sound when you unlock the dishwasher door. It is also normal. But if the machine isn’t a ‘turn-to-close- model, it may signify a broken structure inside the dishwasher door hinges.

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Dishwashers make some considerable level of noise when water is circulating around the interiors or draining. But when these noises are louder than usual or abnormal, it may signify a fault in some parts of the machine.

It is important to note here that a fault in any of the mechanical parts is the usual cause of this unusual noise. These parts include the drain pump or drain hose, chopper blade section, circulation pump, and other motor assemblies. Others are the wash pump motor and so on.

Inspect the dishwasher and the surroundings including the kitchen cabinet where it was installed and fix the problem. 

The dishwasher making noise when water is circulating — Related FAQs

Is It Worth Replacing A Dishwasher Pump?

It is not worth replacing a dishwasher pump. When buying out of warranty, a dishwasher pump and motor are costly. The cost of a dishwasher pump assembly is relatively the same as getting a new dishwasher. 

When you factor in the cost of trips, parts, and labor charges, getting a new dishwasher becomes even a cheaper option. Do not spend vast sums of money repairing significant parts of your dishwasher. All you need to do is replace the dishwasher entirely.

How Do I Test A Noisy Dishwasher Pump?

To test a noisy dishwasher pump, do the following:

  1. Disconnect the dishwasher from electricity before you begin the assessment.
  2. Remove the dishwasher pump. It is found behind the dishwasher’s lower access frame.
  3. Set your multimeter on Rx1. Put the probes in the terminals for testing continuity. One inquiry should be placed on the terminal while the other probe should touch the metal housing of your dishwasher pump. The reading on the multimeter should remain zero. If you notice any additional value from this, you have a faulty pump.

Can You Reset Your Dishwasher?

You can reset your dishwasher. To do this, press and hold the reset button on the body of the appliance for five seconds. Allow the dishwasher to idle for five minutes. Then press the start button. This will reset the dishwasher and return it to functioning as designed.

You will need to reset your dishwasher if it refuses to start, or you have noticed it has begun to malfunction. After resetting your dishwasher and you see the light on the dishwasher panel is blinking, or you hear a beeping sound, then unplug the dishwasher and plug it back again.

How Do You Troubleshoot A Dishwasher Not Starting?

To troubleshoot a dishwasher not starting, do these:

  1. Plug the dishwasher properly.
  2. Turn off the child lock.
  3. Make sure the door latch is functioning correctly.
  4. Reset the dishwasher
  5. Check the electronic control and the dishwasher timer. These parts of the machine are in control of the amount of electricity sent to every part of the dishwasher. When they receive electrical energy, and any of them becomes faulty, your machine will malfunction.
  6. Inspect the dishwasher selector switch. A faulty selector switch will not let your dishwasher function properly. 
  7. Inspect the relay that powers the motor on the dishwasher.
  8. Inspect the dishwasher thermal fuse.
  9. Replace the dishwasher drive motor.

How Do I Know If I Need To Replace My Dishwasher?

You must replace your dishwasher if you notice:

  • Rust forming on your dishwasher. Rust formation is a sign of leakage in your dishwasher drum.
  • Water remaining after a wash cycle. 
  • The door does not lock. Your dishwasher will not run a wash cycle if the doors are not securely lashed. Attempting to run a wash cycle when the door of the dishwasher is open will leave a big mess. 
  • Cracks are appearing on the dishwasher. As soon as you notice cracks appearing on your dishwasher, you must stop the use of the machine at once. 
  • Dishwasher begins to make an unusual sound. 

How Do I Clean A Clogged Dishwasher Pump?

To clean a clogged dishwasher pump, follow these steps:

  1. Remove the dishwasher filter and clean it. Take out the filter and wash it using soap and water. Next, use a brush to wash off stubborn debris mildly.
  2. Remove the covering on the pump. This will allow you to get access to the pump. The dishwasher pump is found directly under the filter.
  3. Properly rinse the dishwasher pump. Use a generous amount of water to clean the sponge and pay extra attention to any piece of food item deposited on the pump. 

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