Why is My Dishwasher Making Loud Sounds?

Appliances like a dishwasher are there to be seen and not heard. Not to mention the fact that they are more hygienic than washing up by hand and at the end of the cycle all the dishes is dried up and ready to use again.

If you are lucky enough to have a dishwasher the chances are it’s unpleasant to contemplate life without it. Furthermore most people would ideally avoid the amount of washing up you would have to do if it develops a fault. If that happens, you’ll want to call a dishwasher repair company to repair the appliance.

Do You Have a Noisy Dishwasher?

It is completely regular for your dishwasher to produce a number of separate noises while running. The water filling the drum, the motor spinning, the dishwasher tablet drawer opening and closing and the noise of the grinder blades are all normal noises.

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

Dishwasher Sounds Include:

The Sound of Water Sloshing or Swishing

The sound of water gurgling and sloshing about is perfectly regular, these sounds might appear quite intrusive to begin with but you will soon get used to them.

Water can regularly make a hissing sound as it enters the machine as well as a sloshing or swishing noise as the spray arms spray it around the machine. The machine will also drain and refill several times each time it runs.

A Thumping Noise

A thumping sound can be de to the spray arm bashing into something that is hanging down from the racks or an oversized plate. Alternatively, it can be the drain line bashing into the wall or cabinets.This is more likely if your machine has recently been installed.

Despite the fact that these aren’t noises a machine is designed to make it is easy to sort out with a little rearrangement.

Normal Humming and Buzzing Sounds

Humming sounds are normal for lots of machines. This is the sound of water draining out of the machine. The humming is a result of the vibration caused by the drain pump and is perfectly regular, it can also pause as the pump helps push food debris and water out of the machine.

Humming could additionally be a result of the fan keeps the dishwasher motor cool while it works.

A lot of dishwashers also include a soft food grinder that could produce a buzzing noise intermittently while the dishwasher is on.

Beeping When the Cycle Finishes

Beeping sounds when the cycles finishes are completely normal despite the fact they could be irritating, especially if your machine ends running in the middle of the night. You should be able to turn this sound off on the dishwasher controls. Check your manual for details as machines will all be slightly different.

Squealing Sound from a New Dishwasher

A new machine can make a squealing noise when it is first installed because there is no water in the drum. This could also result in a rattling noise and could also occur if your machine hasn’t been operated for a while.

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

Irregular Dishwasher Noises

It’s not unusual to be a little on edge if your machine starts making unusual noises, however there is usually no cause for concern.

However, if your dishwasher starts making louder than normal or unusual sounds this could warrant additional investigation, especially when you’ve had the machine for a while and therefore know what is normally sounds like.

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 some dishwashers may make a grinding noise as part of their normal operation if your machine all of a sudden develops a louder than normal or strange grinding noise this is often a sign of an issue and thus needs further investigation.

Most of the time the issue will be that something has become stuck in either the waste disposal or the drain impeller, and therefore is knocking into the blades. in this case you need to stop the machine and check. If you find anything, remove it carefully before re-starting the dishwasher.

Another potential issue is a lack of water in the dishwasher, in which case, you can have a look at the water inlet to try to determine the reason the dishwasher isn’t filling with water.

Irregular Humming, Rattling or Buzzing Noises

While humming and buzzing sounds may be completely normal they may also signal a fault. A damaged motor could produce a loud humming or even squealing sound, if this happens it will usually need to be replaced.

A damaged pump could also make a rattling sound.

Rattling sounds deriving from a dishwasher are often a result of plates and cutlery hitting against each other. Nevertheless, unusually loud thumping may also be indicative of a plumbing issue.

To check, run an empty cycle and if the rattling sound persists this could indicate a faulty motor.

Beeping Mid-Cycle

Although it is completely routine for a dishwasher to beep when it is finished, beeping during the cycle is often your dishwasher letting you know there is an error. Many machines will beep if they are opened before they are finished and the cycle is paused. Or you can have to have a look at your manual.

Knocking, Clunking and Banging Sounds

A rhythmical thumping is more often than not the result of the spray arm hitting an obstruction inside the dishwasher and therefore may be easily rectified by moving your dishes. Items hanging down from the shelves is the most likely cause of this.

It may be a good idea to check that the arm can spin freely each time you use your machine to stop this from being an issue 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 machine is demanding more water than the pipes feeding it are able to supply.

Water hammer may also cause rattling in the pipes.

Unluckily there isn’t much you are able to do to fix this yourself and so it’s easiest to phone a plumber if you imagine this is the problem.

Fixing your Dishwasher

Damaged pumps and motors are often responsible for unusual loud noises coming from your dishwasher. Luckily these parts can be replaced so you shouldn’t need to replace your machine. You could even be able to replace the part yourself or you may wish to contact a local engineer.

More Dishwasher Problems:

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