Why is My Dishwasher Making Loud Sounds?

Home Appliances like a dishwasher are there to be seen and not heard. Not to mention the fact that they get better results than washing up by hand and when you open the machine at the end of the cycle everything is dry and ready to put away.

If you have a dishwasher the probability is it’s difficult to remember life without it. And most people would prefer not to the amount of dishes you would have to do if it develops a fault. In this case, you will want to hire a dishwasher repair company to repair the appliance.

Is Your Dishwasher Too Loud?

It is absolutely normal for your dishwasher to produce a variety of different sounds during a cycle. The water entering the drum, the motor running, the dishwasher tablet compartment clicking open as well as the noise of the grinder blades are all routine noises.

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

Dishwasher Sounds Include:

The Sound of Water Sloshing or Swishing

Water sloshing noises are absolutely regular, these sounds might sound pretty intrusive to begin with although you will soon get used to them.

Water can in many cases make a hissing noise as it comes through the inlet as well as a sloshing or swishing sound as the spray arms disperse it around the machine. The dishwasher will also repeat this process several times during the cycle.

A Pounding Noise

A thumping sound may be the result of the spray arm bumping into something that is hanging down from the racks or an oversized plate. It could also be the drain line banging against the wall or cabinets.

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

Regular Humming as well as Buzzing Sounds

Humming noises are normal for plenty of machines. This is the sound of water pumping out of the dishwasher. The humming is due to the vibration caused by the drain pump and thus is absolutely normal, it may also pause as the pump may not run continuously.

Humming may additionally be heard from the fan keeps the pump motor cool while it runs.

Plenty of dishwashers also have a grinder that could produce a buzzing sound while the dishwasher is on.

Beeping at the End of the Cycle

Beeping sounds at the end of the cycle are absolutely routine despite the fact they may be irritating, particularly if your dishwasher completes its cycle while you’re in bed. You should be able to switch this sound off using the dishwasher controls. Check your owners manual for instructions as machines will all be slightly different.

Squealing Noise from a New Dishwasher

A new dishwasher could produce a squealing noise when it is first installed due to there not being any water in the machine. This can also result in a rattling noise , this could also happen if your dishwasher hasn’t been used for a while.

You could avoid this by putting water in the drum before turning it on for the first time or after you’ve been away.

Worrying Dishwasher Noises

If you pickup funny noises coming from your dishwasher, being a little uneasy is a very normal reaction although usually, it’s nothing to worry about.

On the other hand, if your machine starts making louder than normal or unusual noises this can require additional investigation, in particular when you’ve had your dishwasher for a while and thus know how it usually sounds.

Don’t forget, always turn the power off to your machine before taking it apart.

A Loud or Unusual Grinding Sound

Although some dishwashers may make a soft grinding noise as part of their regular cycle if your machine unexpectedly develops a louder than normal or unusual grinding noise this is not considered a good sign and therefore needs further investigation.

Most of the time the issue will be that something has got stuck in either the waste disposal or the drain impeller, and therefore 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 cycle.

The other possible cause is that there is insufficient water in the drum, in which case, you should check the water inlet valve to try to determine the reason the dishwasher isn’t filling with water.

Irregular Humming, Rattling or Buzzing Noises

While humming as well as buzzing noises may be perfectly regular they can also be a sign of an issue. A broken pump can make a high pitched humming or even squealing noise, in this case you may need a replacement part.

A faulty motor can also make a rattling sound.

Rattling sounds emanating from a dishwasher are most likely caused by dishes and cutlery knocking against each other. Nevertheless, particularly noisy thumping can also be a plumbing issue.

If you run an empty cycle and the rattling sound is still there this could indicate a damaged motor.

Beeping Mid-Cycle

Although it is perfectly routine for a dishwasher to beep at the end of the cycle, beeping half way through the cycle is commonly your machine indicating there is a fault. Many dishwashers will alert you if they are opened before they are finished and the cycle is paused. Or you could have to consult your owners manual.

Knocking, Clunking and Banging Noises

A rhythmical thumping is usually due to the spray arm hitting an obstruction inside the machine and thus could be quickly sorted by moving your dishes. Items hanging down from the shelves is often the problem.

It could be a good idea to check that the arm can turn without obstruction each time you use your machine to stop this from happening as it has a side effect of meaning your dishes don’t get cleaned so well.

Banging, however, is often a result of a household plumbing problem known as water hammer. The banging sound is due to the water pressure in the pipes and therefore often happens when the machine is demanding more water than the pipes feeding it are able to supply.

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

Unluckily there isn’t much you can do to resolve this on your own and so it’s recommended to call an engineer if you suspect this is the problem.

Fixing your Dishwasher

Broken pumps and motors are the most likely cause of strange loud sounds coming from your dishwasher. The good news is these parts can be replaced so you shouldn’t need to replace your machine. You might even be able to to the repair yourself or you may wish to phone a local engineer.

More Dishwasher Problems:

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