Why is My Dishwasher Making Loud Sounds?

Home 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 when they are finished everything is dried up and ready to use again.

If you 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 breaks. In this case, you will want to call a dishwasher repair company to fix the appliance.

Is Your Dishwasher Noisy?

It is completely routine for your dishwasher to make a number of different sounds while running. The water running into the drum, the motor spinning, the dishwasher tablet compartment opening and closing and the noise of the grinder are all regular sounds.

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

Dishwasher Sounds Include:

The Sound of Water Sloshing or Swishing

Water sloshing noises are perfectly regular, they might appear rather intrusive if you are not used to having a dishwasher though they are nothing to worry about.

Water will often produce a hissing sound as it enters the machine as well as a sloshing or swishing noise as the spray arms disperse it around the drum. The dishwasher will also drain and refill during the cycle.

A Thumping Noise

A pounding sound could happen because of the sprayer hitting into an object that is hanging down or an oversized plate. It could also be the drain pipe bashing against the wall or cabinets.

Despite the fact that these aren’t noises a dishwasher should be making it is not difficult to sort out with a little rearrangement.

Routine Humming and Buzzing Sounds

Humming sounds are normal for many machines. This is the sound of water emptying out of the machine. The humming is due to the pump vibrating as it operates and thus is absolutely regular, it could also pause as the pump may not run continuously.

Buzzing may also be a result of the fan keeps the motor cool while it runs.

A lot of machines also have a food disposal grinder that can make a buzzing sound intermittently during the cycle.

Beeping When the Cycle Has Finished

Beeping noises when the cycles has finished are absolutely normal although they may be annoying, especially if your dishwasher completes its cycle at night. You should be able to switch this noise off on the dishwasher controls. Check your owners manual for details as models will vary.

Squealing from a New Dishwasher

A new dishwasher could make a squealing noise the first few times it is run due to there not being any water in the drum. This can also result in a rattling sound and could also occur if your dishwasher hasn’t been operated for a period of time.

You could stop this from happening by adding about a quart of water to the machine before running it for the first time or after you’ve not used it for a while.

Worrying Dishwasher Noises

It’s not unusual to feel a little nervous if your machine starts making unusual noises, however there is usually nothing to worry about.

However, if there are loud or unusual noises coming from your machine this may require additional investigation, especially if you’ve had your dishwasher for some time and thus 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 many dishwashers could produce a grinding noise as part of their regular operation if your dishwasher all of a sudden develops a loud or unusual grinding sound this is not considered a good sign and therefore needs further investigation.

The most common reason will be an item such as an olive stone or corn kernel is caught in either the the waste disposal or the drain impeller, and is knocking against the blades. If you suspect this might be the problem you need to pause the cycle and check. If you find anything, remove it carefully before re-starting the dishwasher.

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

Worrying Humming, Rattling or Buzzing Sounds

While humming and also buzzing sounds may be perfectly routine they could also signal a fault. A damaged motor could produce a high pitched humming or even squealing sound, if this happens it will invariably need to be replaced.

A damaged motor can also make a rattling noise.

Rattling sounds coming from a machine are most likely a result of plates and cutlery hitting into one another. Nonetheless, particularly noisy thumping can also be a water issue.

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

Beeping Mid-Cycle

Although it is perfectly routine for a machine to beep when it is finished, beeping during the cycle is often your dishwasher letting you know there is a fault. Many machines will alert you if they are opened before they are finished and the cycle is paused. Or you could need to have a look at your manual.

Knocking, Clunking and Banging Sounds

A rhythmical knocking is most likely the result of the sprayer bashing something inside the machine and can be quickly rectified by rearranging your dishes. Things descending from the shelves is often the problem.

It can be worthwhile checking the arm can spin without obstruction each time you use your machine to stop this from happening as it also means your dishes don’t get cleaned so well.

Banging, however, is more often an indication of a plumbing issue known as water hammer. The banging sound is due to the water pressure in the pipes and thus usually happens when the dishwasher is in need of more water than the pipes feeding it can supply.

Water hammer may also be the reason behind rattling in the plumbing.

Regrettably there isn’t much you are able to do to resolve this yourself therefore it’s easiest to call an engineer if you imagine this is the problem.

Mending your Dishwasher

Broken pumps and motors are often responsible for strange loud sounds coming from your dishwasher. The good news is these parts can be replaced so you shouldn’t need a whole replacement dishwasher. You might even manage to the repair on your own or you could need to contact a local engineer.

More Dishwasher Problems:

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