Why is My Dishwasher Making Loud Sounds?

Appliances such as a dishwasher are designed to make life easier. Not to mention the fact that they are more hygienic than washing up by hand and when you open the machine at the end of the cycle everything is dried up and ready to put away.

If you are lucky enough to have a dishwasher the chances are it’s hard to remember the idea of not having one. And most people would ideally avoid the piles of dishes you would need to do if it develops a fault. If that happens, you’ll want to call a dishwasher repair company to fix the kitchen appliance.

Do You Use a Rowdy Dishwasher?

It is perfectly regular for your dishwasher to produce an array of separate noises while running. The water running into the drum, the motor spinning, the detergent compartment opening and closing as well as the noise of the grinder blades are all regular sounds.

If you own a new machine these noises could be inconsistent from your old machine, moreover if you have installed a machine for the first time they could not be the noises you were expecting.

Dishwasher Sounds Include:

Water Sound

The sound of water gurgling and sloshing around is completely normal, these sounds may seem pretty intrusive if you are not used to having a dishwasher although you will soon get used to them.

Water can in many cases produce a hissing noise as it enters the machine as well as a sloshing or swishing noise as the spray arms circulate it around the drum. The dishwasher will also drain and refill multiple times each time it runs.

A Pounding Noise

A thumping noise can be the result of the spray arm bumping against something that is dangling from the racks or a large dish. It could also be the drain line bashing into the wall or cabinets.This is more likely if your dishwasher has recently been installed.

Although this isn’t a noise your machine should be making it is easy to rectify with a little adjustment.

Normal Humming and Buzzing Noises

Humming noises are regular for plenty of models. This is the sound of water pumping out of the dishwasher. The humming is a result of the vibration caused by the drain pump and thus is perfectly normal, it could also stop and start as the pump may not run continuously.

Buzzing could additionally be heard as a result of the fan keeps the pump motor cool while it runs.

A lot of machines also have a grinder that could make a humming noise during the cycle.

Beeping at the End of the Cycle

Beeping sounds when the cycles has finished are completely regular although they could be irritating, particularly if your machine finishes its cycle in the middle of the night. You should be able to turn this noise off on the control panel. Check your manual for instructions as machines will all be slightly different.

Squealing Sound from a New Dishwasher

A new dishwasher could produce a squealing sounds when it is first installed due to there not being any water in the machine. This may also result in a rattling sound , this could also happen if your dishwasher hasn’t been operated for a while.

You may stop this from happening by adding about a quart of water to the drum before turning it on for the first time or when you’ve been away.

Worrying Dishwasher Noises

If you notice funny sounds coming from your machine, being a little nervous is a very natural reaction although usually, it’s there’s no cause for concern.

That being said, if there are loud or unusual sounds coming from your dishwasher this can call for additional investigation, in particular when you’ve had the dishwasher for some time and therefore know how it usually sounds.

Don’t forget, 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 many dishwashers can produce a grinding noise as part of their routine cycle if your dishwasher all of a sudden starts making a louder than normal or unusual grinding sound this is not considered a good sign and needs checking out.

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

An alternative possible reason is that there is insufficient water in the machine, in which case, you should check the water inlet valve to try to determine why the machine is empty.

Abnormal Humming, Rattling or Buzzing Sounds

While humming and buzzing noises may be perfectly routine they could also signal a problem. A faulty motor can produce a irregular humming or even squealing sound, in this case you may need a replacement part.

A broken motor may also produce a rattling sound.

Rattling sounds coming from a machine are most likely caused by dishes and cutlery hitting into one another. Nevertheless, particularly noisy banging could also be a plumbing problem.

To check, run an empty cycle and if the rattling sound continues this may indicate a broken motor.

Beeping Before the Cycle is Over

Despite the fact that it is completely routine for a machine to beep when it is finished, beeping during the cycle is usually your dishwasher letting you know there is an error. Many dishwashers will beep if they are opened before they are finished so that the cycle is paused. Or you could have to consult the owners manual.

Knocking, Clunking and Banging Sounds

A regular clunking is usually due to the sprayer hitting an obstruction inside the machine and thus could be quickly sorted by adjusting your dishes. Items dangling from the shelves is often the problem.

It may be worthwhile checking the arm can turn without obstruction routinely to prevent this from happening as it also means your dishes don’t get cleaned so well.

Banging, however, is usually an indication of a plumbing issue often referred to as water hammer. The banging sound is due to the water pressure in the pipes and therefore often happens when the machine is demanding more water than the pipes feeding it are able to supply.

Water hammer could also be the reason behind banging in the plumbing.

Regrettably there isn’t much you can do to solve this on your own and so it’s easiest to contact an engineer if you think this is the problem.

Fixing your Dishwasher

Damaged pumps as well as motors are often responsible for sudden loud sounds emanating from your machine. Luckily these parts can be replaced so you shouldn’t need a whole new dishwasher. You may even be able to replace the part yourself or you may wish to call a local engineer.

More Dishwasher Problems:

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