Why is My Dishwasher Making Loud Sounds?

Your Dishwasher is there to save you time and make your life easier. On top of that they get better results than washing up by hand and in the morning all the dishes is dried up and ready to use again.

If you are fortunate enough to own a dishwasher the chances are it’s hard to imagine life without it. And you would prefer not to the piles of dishes that you would be required to do if it develops a fault. In this case, you’ll need to hire a dishwasher repair company to fix the appliance.

Is Your Dishwasher Too Loud?

It is absolutely regular to pick up an array of different noises while your dishwasher is running. The water filling the machine, the motor running, the dishwasher tablet drawer clicking open and the hum of the grinder blades are all routine sounds.

If you get a new machine these sounds are likely to be different from your old dishwasher, furthermore if you have recently installed a machine they could not be the sounds you expected.

Dishwasher Sounds Include:

Water Sound

The noise of water gurgling and sloshing around is absolutely regular, they can sound quite loud at first although they are nothing to worry about.

Water can in many cases make a hissing noise as it comes through the water inlet as well as a sloshing or swishing noise as the spray arms rotate. The machine will also repeat this process each time it runs.

A Pounding Noise

A pounding sound can be the result of the sprayer bumping into something that is hanging down or an oversized dish. Alternatively, it can be the drain pipe thumping against the wall or cabinets.This is more likely if your machine has just been installed.

Although these aren’t noises a dishwasher should be making it is simple to fix with a little rearrangement.

Routine Humming and Buzzing Sounds

Humming sounds are routine for lots of models. It is the noise the water makes pumping out of the dishwasher. The humming is due to the vibration caused by the drain pump and is completely routine, it could also stop and start as the pump helps push food debris and water out of the machine.

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

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

Beeping When the Cycle Has Finished

Beeping sounds at the end of the cycle are completely regular although they could be irritating, particularly if your dishwasher ends running at night. In most cases you can turn this sound off using the dishwasher controls. .

Squealing from a New Dishwasher

A new dishwasher can make a squealing noise on first use due to there not being any water in the machine. This could also cause a rattling sound and may also occur if your machine hasn’t been operated for a while.

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

Worrying Dishwasher Noises

It’s not uncommon to get a little uneasy if your machine starts making funny noises, however there is usually no cause for concern.

That being said, if your machine starts making louder than normal or unusual sounds this may require additional investigation, in particular when you’ve had your dishwasher for a while and 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.

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 machine unexpectedly develops a loud or unusual grinding noise this is not considered a good sign and needs further investigation.

Most of the time the 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 therefore is knocking into the blades. in this case you need to stop the machine and check. If you discover something, remove it carefully before re-starting the cycle.

Another possible reason is that there is insufficient water in the dishwasher, in which case, you should check the water inlet valve to try to find out the reason the machine is empty.

Worrying Humming, Rattling or Buzzing Noises

While humming as well as buzzing noises can be absolutely regular they may also indicate a fault. A broken motor can produce a irregular humming or even squealing noise, if this happens it will often need to be replaced.

A faulty pump may also make a rattling sound.

Rattling sounds emanating from a machine are most likely caused by plates and cutlery knocking into one another. Nonetheless, particularly noisy thumping may also be a plumbing issue.

If you run an empty cycle and the rattling sound persists this may be evidence of a damaged pump.

Beeping Mid-Cycle

Although it is absolutely routine for a machine to beep when it is finished, beeping during the cycle is often your dishwasher indicating there is a fault. Many dishwashers will beep if they are interrupted half way through the cycle so that the cycle is paused. Or you could need to consult your owners manual.

Knocking, Clunking and Banging Sounds

A rhythmical knocking is more often than not the result of the spray arm hitting something inside the dishwasher and may be easily fixed by adjusting your dishes. Things hanging down from the shelves is often the problem.

It may be a good idea to check that the arm is able to turn freely each time you use your machine to prevent this from being an issue as it also means your dishes aren’t being cleaned effectively.

Banging, however, is usually a sign of a plumbing problem known as water hammer. The banging noise is due to the water pressure in the pipes and thus usually happens when the valves are opening and closing.

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

Regrettably there isn’t much you are able to do to solve this on your own and so it’s easiest to phone a plumber if you think this is the problem.

Mending your Dishwasher

Damaged pumps or motors are often responsible for strange loud sounds emanating from your machine. Luckily these parts can be replaced so you shouldn’t need to replace your dishwasher. You could even manage replace the part yourself or you could need to contact a local repair person.

More Dishwasher Problems:

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