Why is My Dishwasher Making Loud Sounds?

Your Dishwasher is 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 when they are finished everything is dry and ready to put away.

If you use a dishwasher the chances are it’s difficult to imagine life without it. And you would ideally avoid the amount of washing up you would be required to do if it develops a fault. In this case, you’ll want to call a dishwasher repair company to fix the kitchen appliance.

Do You Have a Noisy Dishwasher?

It is perfectly regular for a dishwasher to produce a number of distinct sounds while running. The water entering the machine, the motor turning, the dishwasher tablet drawer opening and closing as well as the noise of the grinder blades are all routine sounds.

If you replace your dishwasher these noises may be unlike your old dishwasher, furthermore if you have recently installed a dishwasher they may not be the noises you expected.

Dishwasher Sounds Include:

A Water Sloshing or Swishing Noise

Hearing water gurgling and sloshing around is perfectly regular, these noises might sound pretty intrusive at first but they are nothing to worry about.

Water will in many cases produce a hissing noise as it comes through the inlet valve and a sloshing or swishing noise as the spray arms circulate the water around the drum. The machine will also drain and refill several times each time it runs.

A Pounding Sound

A pounding sound could be the result of the spray arm bumping into something that is dangling or a large plate. Alternatively, it could be the drain line thumping into the wall or cabinets.

Despite the fact that these aren’t noises a dishwasher is designed to make it is not difficult to fix with a little rearrangement.

Regular Humming and Buzzing Noises

Humming sounds are normal for many machines. It is the noise the water makes draining out of the machine. The buzzing is due to the vibration caused by the drain pump and thus is completely regular, it may also pause as the pump may not run continuously.

Buzzing can additionally be heard as a result of the fan keeps the dishwasher pump motor cool while it works.

Many machines also include a food disposal grinder that may produce a buzzing noise intermittently during the cycle.

Beeping at the End of the Cycle

Beeping noises when the cycles has finished are completely routine despite the fact they may be annoying, especially if your dishwasher ends its cycle at night. In most cases you can turn this sound off using the dishwasher controls. .

Squealing from a New Dishwasher

A new dishwasher can produce a squealing sounds when it is first installed due to there not being any water in the drum. This can also cause a rattling noise , this can also happen if your machine hasn’t been operated for a period of time.

You can stop this from happening by putting water in the dishwasher before running it for the first time or when you’ve not used it for a while.

Abnormal Dishwasher Noises

If you hear funny sounds emanating from your machine, getting a little nervous is a very natural reaction though usually, it’s nothing to worry about.

On the other hand, if your machine starts making louder than normal or unusual sounds this may warrant further investigation, in particular when you’ve had the machine for some time and 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.

Loud or Unusual Grinding Noises

Although many machines may make a grinding noise as part of their normal operation if your dishwasher all of a sudden develops a loud or unusual grinding noise this is often a sign of an issue and needs checking out.

The most common issue 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 problem you should pause the cycle and check. If you discover something, carefully take it out before re-starting the cycle.

Another possible reason is a lack of water in the machine, in which case, you should check the water inlet to try to find out the reason the machine doesn’t have enough water.

Abnormal Humming, Rattling or Buzzing Noises

While humming and also buzzing noises could be completely regular they may also be a sign of an issue. A broken pump can produce a irregular humming or even shrieking sound, in this case you may need a replacement part.

A faulty motor could also make a rattling sound.

Rattling sounds coming from a dishwasher are most likely a result of dishes and cutlery knocking against each other. However, particularly loud rattling can also be indicative of a water issue.

To check, run an empty cycle and if the rattling sound is still there this can be evidence of a damaged motor.

Beeping Mid-Cycle

Despite the fact that it is completely normal for a machine to beep at the end of the cycle, beeping during the cycle is commonly your machine telling you there is an error. Many dishwashers will alert you if they are opened half way through the cycle and the cycle is paused. Or you may need to have a look at the owners manual.

Knocking, Clunking and Banging Sounds

A regular thumping is usually due to the arm hitting something inside the dishwasher and therefore may be easily sorted by adjusting your dishes. Items hanging down from the racks is often the problem.

It can be a good idea to check that the arm is able to turn without obstruction regularly before starting your machine to stop this from being an issue as it has a side effect of meaning your dishes don’t get cleaned so well.

Banging, on the other hand, is usually a result of a household plumbing problem known as water hammer. The banging sound is due to the water pressure in the pipes and thus often occurs when the machine is in need of more water than the pipes feeding it can provide.

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

Unfortunately there isn’t much you are able to do to fix this without professional help therefore it’s best to contact an engineer if you imagine this is the problem.

Mending your Dishwasher

Broken pumps or motors are often responsible for strange loud sounds emanating from your dishwasher. Luckily these parts are replaceable so you shouldn’t need a whole replacement dishwasher. You may even be able to to the repair yourself or you might need to call a local engineer.

More Dishwasher Problems:

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