Why is My Dishwasher Making Loud Sounds?

Appliances such as a dishwasher are designed to make life easier. Plus they are more hygienic than washing up by hand and in the morning everything is dried up and ready to use again.

If you are fortunate enough to own a dishwasher the likelihood is it’s hard to imagine the idea of not having one. Moreover most people would prefer not to the amount of dishes that you would have to do if it develops a fault. If that happens, you’ll need to hire a dishwasher repair company to fix the kitchen appliance.

Is Your Dishwasher Too Loud?

It is perfectly regular for your dishwasher to produce an array of separate sounds while running. The water running into the machine, the motor spinning, the detergent drawer clicking open and the buzz of the soft food grinder are all normal sounds.

If you get a new dishwasher these noises could be unlike your old dishwasher, moreover if you have recently installed a machine they may not be the noises you expected.

Dishwasher Sounds Include:

The Sound of Water Sloshing or Swishing

Water sloshing noises are completely normal, these noises can appear pretty intrusive if you are not used to having a dishwasher but you will soon get used to them.

Water will often make a hissing noise as it enters the machine as well as a sloshing or swishing noise as the spray arms circulate it around the machine. The dishwasher will also drain and refill multiple times each time it runs.

A Pounding Noise

A pounding noise may be the result of the spray arm bumping into an object that is hanging down from the racks or an oversized plate. It could also be the drain pipe bashing against the wall or cabinets.

Despite the fact that this isn’t a noise a machine is designed to make it is simple to rectify with a little rearrangement.

Regular Humming as well as Buzzing Sounds

Humming sounds are routine for plenty of models. It is the sound of water emptying out of the machine. The humming is a result of the vibration caused by the drain pump and thus is completely regular, it could also pause as the pump helps push food debris and water out of the machine.

Humming may additionally be heard as a result of the fan that cools the dishwasher pump motor while it is spinning.

Many dishwashers also include a grinder that can produce a buzzing noise intermittently while the dishwasher is on.

Beeping at the End of the Cycle

Beeping sounds at the end of the cycle are absolutely regular although they may be irritating, particularly if your dishwasher finishes running in the middle of the night. You should be able to turn the beeping off on the control panel. Check your instructions for details as machines will vary.

Squealing from a New Dishwasher

A new machine can produce a squealing noise the first few times it is run due to there not being any water in the drum. This can also cause a rattling sound , this could also happen if your machine has been out of action for a while.

You may avoid this by adding about a quart of water to the machine before turning it on for the first time or after you’ve been away.

Abnormal Dishwasher Noises

If you notice funny noises emanating from your dishwasher, being a little nervous is a very natural reaction though usually, it’s nothing to worry about.

That being said, if your dishwasher starts making louder than normal or unusual sounds this can warrant additional investigation, in particular if you’ve had your dishwasher for some time and thus know how it usually sounds.

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

Loud or Unusual Grinding Sounds

Although plenty of dishwashers could make a grinding noise as part of their regular cycle if your dishwasher suddenly starts making a louder than normal or unusual grinding noise this is often a sign of an issue and therefore needs further investigation.

Most of the time the cause will be that something has got stuck in either the waste disposal or the drain impeller, and therefore is grinding into the blades. in this case you need to pause the cycle and check. If you find something, remove it carefully before re-starting the dishwasher.

The other possible issue is a lack of water in the drum, in which case, you can check the water inlet valve to try to determine the reason the dishwasher doesn’t have enough water.

Abnormal Humming, Rattling or Buzzing Sounds

While humming and buzzing noises may be absolutely regular they can also be a sign of a problem. A damaged motor can produce a loud humming or even squealing noise, if this happens it will usually need to be replaced.

A broken motor may also make a rattling noise.

Rattling sounds coming from a dishwasher are often caused by plates or cutlery hitting against each other. Nonetheless, unusually noisy banging can also be a water issue.

If you run an empty cycle and the rattling sound continues this could be evidence of a broken motor.

Beeping During the Cycle

Despite the fact that it is perfectly routine for a machine to beep when it is finished, beeping half way through the cycle is often your machine telling you there is an error. 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 your owners manual.

Knocking, Clunking and Banging Noises

A regular thumping is usually the result of the spray arm hitting something inside the dishwasher and thus may be quickly sorted by adjusting your dishes. Things descending from the racks is the most likely cause of this.

It can be worthwhile checking the arm can rotate freely routinely to prevent this from being an issue as it also means your dishes aren’t being cleaned effectively.

Banging, however, is more often an indication of a plumbing issue often referred to as water hammer. The banging noise is related to the water pressure in the pipes and usually occurs when the dishwasher is in need of more water than the pipes feeding it are able to supply.

Water hammer could also be the reason behind rattling in the pipes.

Unluckily there isn’t much you can do to solve this yourself therefore it’s easiest to contact an engineer if you suspect this is an issue.

Mending your Dishwasher

Faulty pumps or motors are often responsible for strange loud sounds emanating from your machine. The good news is these parts can be replaced so you shouldn’t need a whole new machine. You might even be able to to the repair on your own or you might wish to contact a local engineer.

More Dishwasher Problems:

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