Why is My Dishwasher Making Loud Sounds?

Home Appliances such as a dishwasher are there to be seen and not heard. Not to mention the fact that they are more hygienic than hand washing and when you open the machine in the morning all the dishes is dry and ready to put away.

If you are lucky enough to own a dishwasher the probability is it’s unpleasant to remember the idea of not having one. And you would definitely rather not imagine the mountain of dishes that you would need to do if it develops a fault. If that happens, you will need to call a dishwasher repair company to repair the appliance.

Do You Own a Rowdy Dishwasher?

It is perfectly routine to pick up an array of separate noises while your dishwasher is running. The water running into the machine, the motor working, the dishwasher tablet compartment opening and closing as well as the hum of the grinder blades are all routine noises.

If you own a new dishwasher these noises could be different from your old machine, and if you have installed a machine for the first time they might not be the sounds you expected.

Dishwasher Sounds Include:

A Water Sloshing or Swishing Noise

Hearing water gurgling and sloshing around is completely regular, these sounds might seem pretty intrusive at first but they are nothing to worry about.

Water will regularly make a hissing sound as it enters the machine as well as a sloshing or swishing noise as the spray arms rotate. The machine will also drain and refill during the cycle.

A Pounding Sound

A thumping noise could be de to the spray arm bashing into something that is hanging down from the racks or an oversized plate. It could also be the drain line thumping against the wall or cabinets.

Although this isn’t a noise your machine is designed to make it is simple to sort out with a little adjustment.

Regular Humming and Buzzing Noises

Humming sounds are regular for many models. It is the sound of water emptying out of the dishwasher. The buzzing is due to the vibration caused by the drain pump and is perfectly routine, it can also pause as the pump may not run continuously.

Humming could additionally be a result of the fan that cools the dishwasher pump motor while it is running.

Plenty of machines also have a soft food grinder that could produce a buzzing sound intermittently while the dishwasher is on.

Beeping When the Cycle Finishes

Beeping sounds when the cycles has finished are perfectly routine despite the fact they can be irritating, especially if your dishwasher completes its cycle in the middle of the night. In most cases you can turn this noise off on the dishwasher controls. .

Squealing Sound from a New Dishwasher

A new dishwasher can make a squealing sounds on first use due to there not being any water in the machine. This could also cause a rattling noise , this could also happen if your machine hasn’t been used for a while.

You can stop this from happening by putting water in the dishwasher before turning it on for the first time or after you’ve been away.

Abnormal Dishwasher Noises

It’s not uncommon to feel a little on edge if your machine starts making unusual sounds, however there is usually nothing to worry about.

On the other hand, if your dishwasher starts making louder than normal or unusual noises this may require additional investigation, in particular if you’ve had the machine for some time and thus know what is normally sounds like.

Remember, if you are going to start taking your machine apart you should always turn off the power first.

A Loud or Unusual Grinding Sound

Despite the fact that plenty of dishwashers may make a grinding noise as part of their normal operation if your dishwasher unexpectedly develops a loud or strange grinding noise this is not considered a good sign and needs checking out.

The most likely cause will be that something is caught in either the the waste disposal or the drain impeller, and is grinding into the blades. If you suspect this could be the issue you need to stop the machine and check. If you discover something, remove it carefully before re-starting the cycle.

An alternative possible cause is a lack of water in the dishwasher, in which case, you should check the water inlet valve to try to find out the reason the dishwasher doesn’t have enough water.

Worrying Humming, Rattling or Buzzing Sounds

While humming and also buzzing noises can be absolutely routine they can also signal a problem. A broken motor can make a high pitched humming or even squealing noise, in this case you may need a replacement part.

A faulty motor can also produce a rattling noise.

Rattling sounds deriving from a machine are most likely a result of dishes and cutlery bashing against each other. Nevertheless, particularly noisy banging may also be a water problem.

To check, run an empty cycle and if the rattling sound persists this can be evidence of a broken pump.

Beeping Mid-Cycle

Although it is perfectly routine for a machine to beep at the end of the cycle, beeping mid cycle is usually your machine indicating there is a fault. Many dishwashers will beep if they are opened half way through the cycle so that the cycle is paused. Or you may have to have a look at the owners manual.

Knocking, Clunking and Banging Sounds

A rhythmical knocking is usually due to the sprayer hitting something inside the machine and therefore may be easily fixed by adjusting your dishes. Items hanging down from the shelves is often the problem.

It could be a good idea to check that the arm is able to turn freely regularly before starting your machine to prevent this from happening as it also means your dishes don’t get cleaned so well.

Banging, on the other hand, is usually a result of a plumbing problem often referred to as water hammer. The banging sound is due to the water pressure in the pipes and therefore usually happens when the valves are opening and closing.

Water hammer can also cause banging in the pipes.

Unfortunately there isn’t much you can do to solve this without professional help and so it’s recommended to phone an engineer if you think this is an issue.

Mending your Dishwasher

Faulty pumps or motors are the most likely cause of sudden loud sounds emanating from your machine. Luckily these parts are replaceable so you shouldn’t need to replace your dishwasher. You may even be able to to the repair on your own or you could wish to phone a local repair person.

More Dishwasher Problems:

  • Dishwasher Leaking
  • Dishwasher Not Turning On
  • Dishwasher Not Draining
  • Dishwasher Not Drying