Why is My Dishwasher Making Loud Sounds?

Machines like a dishwasher are designed to make life easier. Not to mention the fact that they get better results than hand washing and in the morning all the dishes is dry and ready to put away.

If you use a dishwasher the probability is it’s unpleasant to contemplate life without it. Moreover most people would ideally avoid the piles of dishes that you would have to do if it breaks down. In this case, you will need to hire a dishwasher repair company to fix the appliance.

Is Your Dishwasher Too Loud?

It is completely normal for your dishwasher to produce an array of different sounds during a cycle. The water filling the drum, the motor turning, the detergent drawer clicking open and the hum of the soft food grinder are all routine noises.

If you have a new machine these sounds are likely to be inconsistent from your old machine, moreover if you have installed a dishwasher for the first time they may not be the noises you expected.

Dishwasher Sounds Include:

A Water Sloshing or Swishing Noise

Water sloshing noises are perfectly regular, these sounds might seem quite loud if you are not used to having a dishwasher although you will soon get used to them.

Water will often produce a hissing noise as it enters the machine and a sloshing or swishing noise as the spray arms disperse the water around the drum. The machine will also repeat this process each time it runs.

A Pounding Sound

A thumping noise may happen because of the sprayer hitting into something that is hanging down or an oversized dish. Alternatively, it may be the drain pipe banging into the wall or cabinets.This is more likely if your machine has recently been installed.

Despite the fact that this isn’t a noise a dishwasher is designed to make it is easy to sort out with a little rearrangement.

Routine Humming and Buzzing Sounds

Humming sounds are routine for plenty of machines. This is the sound of water emptying out of the machine. The humming is due to the vibration caused by the drain pump and thus is perfectly normal, it could also stop and start as the pump may not run continuously.

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

Plenty of machines also include a soft food grinder that could produce a humming noise while the dishwasher is on.

Beeping When the Cycle Has Finished

Beeping sounds when the cycles finishes are perfectly routine although they may be annoying, particularly if your dishwasher completes running while you’re in bed. You should be able to turn the beeping off on the dishwasher controls. Check your instructions for instructions as machines will all be slightly different.

Squealing Sound from a New Dishwasher

A new machine may produce a squealing noise the first few times it is run because there is no water in the machine. This may also result in a rattling sound and could also occur if your dishwasher hasn’t been operated for a period of time.

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

Irregular Dishwasher Noises

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

That being said, if there are louder than usual or unusual sounds coming from your machine this can call for additional investigation, in particular when you’ve had the dishwasher for a while and know how it usually sounds.

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

Loud or Unusual Grinding Noises

Despite the fact that some machines can make a grinding noise as part of their normal cycle if your dishwasher all of a sudden starts making a loud or strange grinding sound this is not considered a good sign and therefore needs further investigation.

Most of the time the issue 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 grinding against the blades. If you suspect this might be the problem you need to stop the machine and have a look. If you discover something, remove it carefully before re-starting the dishwasher.

Another potential issue is that there is insufficient water in the machine, in which case, you can have a look at the water inlet to try to find out the reason the machine isn’t filling with water.

Abnormal Humming, Rattling or Buzzing Sounds

While humming and buzzing noises can be perfectly routine they may also signal a problem. A damaged motor can produce a irregular humming or even shrieking noise, in this case you may need a replacement part.

A broken pump can also make a rattling noise.

Rattling sounds coming from a dishwasher are often a result of plates and cutlery knocking against each other. However, particularly loud thumping could also be a plumbing problem.

If you run an empty cycle and the rattling sound continues this may indicate a damaged motor.

Beeping Before the Cycle is Over

Although it is absolutely normal for a dishwasher to beep at the end of the cycle, beeping during the cycle is commonly your dishwasher indicating there is an error. Many machines will alert you if they are opened before they are finished so that the cycle is paused. Or you could need to consult your manual.

Knocking, Clunking and Banging Sounds

A rhythmic thumping is more often than not due to the spray arm bashing an obstruction inside the machine and can be quickly fixed by rearranging your dishes. Things descending from the shelves is often the problem.

It can be a good idea to check that the arm can rotate freely routinely to stop this from being an issue as it has a side effect of meaning your dishes aren’t being cleaned effectively.

Banging, on the other hand, is usually a sign of a plumbing issue often referred to as water hammer. The banging sound is related to the water pressure in the pipes and often occurs when the machine is in need of more water than the pipes feeding it are able to provide.

Water hammer can also result in rattling in the pipes.

Regrettably there isn’t much you are able to do to resolve this on your own therefore it’s recommended to call an engineer if you imagine this is an issue.

Fixing your Dishwasher

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

More Dishwasher Problems:

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