Why is My Dishwasher Making Loud Sounds?

Your Dishwasher is there to be seen and not heard. Plus they are more hygienic than washing up by hand and when they are finished everything is already dry and ready to put away.

If you have a dishwasher the likelihood is it’s difficult to contemplate the idea of not having one. Furthermore you would ideally avoid the piles of dishes that you would have to do if it breaks down. If that happens, you will want to call a dishwasher repair company to fix the appliance.

Is Your Dishwasher Too Loud?

It is absolutely normal for your dishwasher to produce a number of different noises while running. The water filling the machine, the motor working, the dishwasher tablet drawer opening and closing as well as the buzz of the grinder are all regular sounds.

If you own a new machine these sounds could be different from your old machine, furthermore if you have installed a machine for the first time they could not be the noises you were expecting.

Dishwasher Sounds Include:

A Water Sloshing or Swishing Noise

Water sloshing noises are completely normal, they might seem rather intrusive at first though they are nothing to worry about.

Water will regularly produce a hissing noise as it enters the machine and a sloshing or swishing sound as the spray arms rotate. The machine will also drain and refill several times during the cycle.

A Pounding Sound

A thumping sound may be de to the sprayer bumping against something that is dangling from the racks or a large plate. Alternatively, it could be the drain line banging into the wall or cabinets.

Although these aren’t noises your dishwasher is designed to make it is easy to rectify with a little adjustment.

Routine Humming and Buzzing Sounds

Humming noises are normal for plenty of machines. This is the noise the water makes pumping out of the dishwasher. The buzzing is a result of the vibration caused by the drain pump and is completely routine, it could also pause as the pump helps push food debris and water out of the machine.

Buzzing could also be heard from the fan that cools the motor while it is working.

A lot of dishwashers also have a grinder that may produce a humming noise intermittently while the dishwasher is on.

Beeping at the End of the Cycle

Beeping sounds at the end of the cycle are completely regular although they may be irritating, particularly if your machine completes its cycle while you’re in bed. You should be able to switch this sound off on the dishwasher controls. .

Squealing from a New Dishwasher

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

You may avoid this by adding about a quart of water to the drum before turning it on for the first time or after you’ve not used it for a while.

Irregular Dishwasher Noises

If you hear unusual sounds emanating from your dishwasher, getting a little uneasy is a very normal reaction though usually, it’s there’s no cause for concern.

That being said, if your dishwasher starts making louder than normal or unusual sounds this could warrant further investigation, in particular if you’ve had your dishwasher for a while and therefore know what is normally sounds like.

Remember, always cut the power to your machine before taking it apart.

Loud or Unusual Grinding Noises

Although plenty of dishwashers can produce a grinding noise as part of their regular operation if your dishwasher unexpectedly develops a loud or unusual grinding noise this is often a sign of an issue and needs checking out.

The most likely issue will be an item such as an olive stone or corn kernel has got 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 have a look. If you discover anything, remove it carefully before re-starting the cycle.

The other possible reason is that there is insufficient water in the machine, if this is the case you can check the water inlet valve to try to determine why the machine doesn’t have enough water.

Abnormal Humming, Rattling or Buzzing Sounds

While humming as well as buzzing sounds can be perfectly normal they could also signal an issue. A faulty pump can produce a irregular humming or even shrieking sound, if this happens it will invariably need to be replaced.

A broken motor may also produce a rattling noise.

Rattling noises coming from a dishwasher are most likely a result of plates and cutlery bashing against each other. However, unusually noisy thumping can also be indicative of a water problem.

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

Beeping During the Cycle

Despite the fact that it is perfectly routine for a machine to beep at the end of the cycle, beeping during the cycle is usually your dishwasher letting you know there is a fault. Many machines will alert you if they are opened half way through the cycle so that the cycle is paused. Or you may need to consult your owners manual.

Knocking, Clunking and Banging Sounds

A rhythmic knocking is usually the result of the sprayer hitting something inside the machine and therefore could be quickly fixed by moving your dishes. Items descending from the racks is often the problem.

It could be a good idea to check that the arm is able to turn 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 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 therefore often happens when the dishwasher is in need of more water than the pipes feeding it can provide.

Water hammer could also cause banging in the plumbing.

Unluckily there isn’t much you can do to fix this on your own therefore it’s easiest to call a plumber if you imagine this is an issue.

Mending your Dishwasher

Damaged pumps and motors are the most likely cause of sudden loud sounds coming from your dishwasher. Luckily these parts are replaceable so you shouldn’t need a whole replacement machine. You might even be able to replace the part on your own or you might need to call a local engineer.

More Dishwasher Problems:

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