Why is My Dishwasher Making Loud Sounds?

Machines such as a dishwasher are there to be seen and not heard. Not to mention the fact that they are more hygienic than hand washing and when you open the machine when they are finished everything is dry and ready to put away.

If you are lucky enough to have a dishwasher the chances are it’s difficult to imagine life without it. Furthermore you would ideally avoid the piles of washing up that you would need to do if it breaks. If that happens, you will need to hire a dishwasher repair company to repair the appliance.

Is Your Dishwasher Noisy?

It is perfectly normal for your dishwasher to make an assortment of distinct noises during a cycle. The water entering the drum, the motor spinning, the detergent drawer opening and closing as well as the hum of the grinder blades are all normal noises.

If you replace your machine these noises may be different from your old machine, and if you have installed a dishwasher for the first time they could not be the sounds you were expecting.

Dishwasher Sounds Include:

Water Sound

Water sloshing noises are absolutely normal, they can appear pretty noisy if you are not used to having a dishwasher but you will soon get used to them.

Water can often make a hissing sound as it enters the machine and a sloshing or swishing noise as the spray arms circulate it around the drum. The machine will also drain and refill multiple times each time it runs.

A Thumping Sound

A thumping noise can happen because of the spray arm bashing against something that is hanging down or a large plate. Alternatively, it may be the drain pipe banging into the wall or cabinets.

Although these aren’t noises your machine is designed to make it is not difficult to fix with a little rearrangement.

Routine Humming as well as Buzzing Sounds

Humming noises are routine for many machines. It is the noise the water makes draining out of the dishwasher. The humming is a result of the vibration caused by the drain pump and thus is completely regular, it could also pause as the pump may not run continuously.

Humming could also be heard from the fan that cools the dishwasher motor while it is spinning.

A lot of dishwashers also have a grinder that can produce a buzzing noise during the cycle.

Beeping at the End of the Cycle

Beeping noises at the end of the cycle are absolutely regular despite the fact they may be annoying, especially if your dishwasher completes running while you’re in bed. You should be able to switch this noise off on the control panel. .

Squealing from a New Dishwasher

A new dishwasher can produce a squealing noise the first few times it is run due to there not being any water in the machine. This could also result in a rattling sound , this can also happen if your dishwasher hasn’t been used for a period of time.

You may stop this from happening by putting water in the drum before running it for the first time or after you’ve not used it for a while.

Worrying Dishwasher Noises

If you pickup strange sounds emanating from your machine, being a little nervous is a very natural reaction although usually, it’s there’s no cause for concern.

That being said, if there are louder than usual or unusual noises coming from your dishwasher this can warrant additional investigation, in particular when you’ve had the dishwasher for a while and know what is normally sounds like.

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

Loud or Unusual Grinding Noises

Despite the fact that plenty of machines may make a soft grinding noise as part of their normal cycle if your dishwasher unexpectedly develops a louder than normal or unusual grinding noise this is generally not a good sign and needs further investigation.

Most of the time the cause will be that something is caught in either the the waste disposal or the drain impeller, and therefore is knocking against the blades. If you suspect this could be the problem you should pause the cycle and check. If you find anything, remove it carefully before re-starting the dishwasher.

Another potential cause is that there is insufficient water in the machine, if this is the case you can have a look at the water inlet to try to find out the reason the machine doesn’t have enough water.

Abnormal Humming, Rattling or Buzzing Noises

While humming and buzzing sounds can be absolutely normal they may also signal a fault. A faulty motor can make a irregular humming or even squealing noise, in this case you may need a replacement part.

A damaged pump may also make a rattling noise.

Rattling sounds coming from a dishwasher are most likely caused by plates or cutlery knocking into one another. Nonetheless, particularly loud thumping may also be indicative of a water problem.

To check, run an empty cycle and if the rattling sound is still there this may indicate a damaged pump.

Beeping During the Cycle

Although it is perfectly regular for a machine to beep at the end of the cycle, beeping half way through the cycle is often your machine telling you there is a fault. Many machines will beep if they are opened mid-cycle so that the cycle is paused. Or you may need to consult the manual.

Knocking, Clunking and Banging Sounds

A rhythmical clunking is most likely due to the arm hitting something inside the machine and thus could be quickly sorted by moving your dishes. Items descending from the shelves is often the problem.

It can be worthwhile checking the arm can spin freely routinely to prevent this from happening as it has a side effect of meaning your dishes aren’t being cleaned effectively.

Banging, on the other hand, is more often a sign of a plumbing issue known as water hammer. The banging sound is related to the water pressure in the pipes and thus usually occurs when the valves are opening and closing.

Water hammer could also result in banging in the plumbing.

Unluckily there isn’t much you are able to do to resolve this on your own and so it’s easiest to phone a plumber if you imagine this is an issue.

Mending your Dishwasher

Faulty pumps or motors are often responsible for sudden loud noises emanating from your machine. The good news is these parts are replaceable so you shouldn’t need to replace your machine. You could even be able to to the repair yourself or you could wish to contact a local repair person.

More Dishwasher Problems:

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