Why is My Dishwasher Making Loud Sounds?

Your Dishwasher is designed to make life easier. Plus they get better results than washing up by hand and when they are finished everything is dried up and ready to use again.

If you are lucky enough to have a dishwasher the probability is it’s unpleasant to imagine life without it. And most people would ideally avoid the mountain of dishes 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.

Do You Own a Rowdy Dishwasher?

It is perfectly routine to pick up a number of different sounds while your machine is running. The water running into the drum, the motor spinning, the detergent drawer opening and closing and the noise of the soft food grinder are all regular sounds.

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

Dishwasher Sounds Include:

Water Sound

The noise of water gurgling and sloshing about is completely normal, they can sound pretty noisy if you are not used to having a dishwasher but you will soon get used to them.

Water will in many cases make a hissing noise as it comes through the water inlet valve and a sloshing or swishing sound as the spray arms rotate. The dishwasher will also drain and refill multiple times during the cycle.

A Thumping Sound

A pounding noise could be de to the spray arm hitting against an object that is dangling from the racks or an oversized plate. It could also be the drain pipe thumping into the wall or cabinets.This is more likely if your dishwasher has recently been installed.

Despite the fact that this isn’t a noise your machine is designed to make it is easy to fix with a little rearrangement.

Normal Humming and Buzzing Noises

Humming sounds are routine for many machines. It is the noise the water makes draining out of the machine. The humming is due to the drain pump vibrating as it operates and is completely regular, it can also stop and start as the pump helps push food debris as well as water out of the machine.

Buzzing may also be heard from the fan keeps the dishwasher motor cool while it works.

A lot of machines also include a grinder that may produce a humming noise intermittently during the cycle.

Beeping at the End of the Cycle

Beeping noises when the cycles has finished are perfectly regular although they could be annoying, especially if your machine ends running while you’re in bed. You should be able to turn this noise off using the control panel. .

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 can also result in a rattling noise and can also occur if your dishwasher hasn’t been used for a while.

You could avoid this by adding about a quart of water to the machine before turning it on for the first time or after you’ve been away.

Worrying Dishwasher Noises

It’s not unusual to be a little uneasy if your dishwasher starts making strange noises, however there is usually nothing to worry about.

However, if there are louder than usual or unusual noises coming from your dishwasher this may require additional investigation, in particular when you’ve had your machine for some time and thus know what is normally sounds like.

Remember, if you are going to start taking your machine apart you should always turn off the power first.

Loud or Unusual Grinding Noises

Although many machines may produce a soft grinding noise as part of their normal operation if your machine suddenly develops a louder than normal or strange grinding sound this is not considered a good sign and thus needs checking out.

Most of the time the cause will be that something is caught in either the the waste disposal or the drain impeller, and is knocking against the blades. If you suspect this might be the problem you should pause the cycle and have a look. If you discover anything, carefully take it out before re-starting the machine.

Another possible reason is that there is insufficient water in the machine, in which case, you can check the water inlet valve to try to determine the reason the machine isn’t filling with water.

Worrying Humming, Rattling or Buzzing Noises

While humming as well as buzzing sounds could be absolutely routine they could also be a sign of an issue. A broken motor can make a loud humming or even shrieking sound, if this happens it will usually need to be replaced.

A faulty motor could also produce a rattling noise.

Rattling sounds deriving from a machine are usually caused by dishes or cutlery knocking into one another. However, particularly noisy thumping can also be indicative of a plumbing problem.

To check, run an empty cycle and if the rattling sound persists this could be evidence of a faulty motor.

Beeping During the Cycle

Although it is perfectly regular for a machine to beep when it is finished, beeping mid cycle is often your dishwasher indicating there is an error. Many machines will alert you if they are interrupted before they are finished so that the cycle is paused. Or you can need to have a look at the owners manual.

Knocking, Clunking and Banging Noises

A rhythmic clunking is most likely the result of the arm hitting an obstruction inside the machine and therefore can be easily fixed by moving your dishes. Things dangling from the shelves is the most likely cause of this.

It could be a good idea to check that the arm is able to rotate without obstruction regularly before starting your machine to stop this from happening as it has a side effect of meaning your dishes don’t get cleaned so well.

Banging, on the other hand, is often an indication of a household plumbing issue known as water hammer. The banging sound is related to the water pressure in the pipes and usually happens when the dishwasher is in need of more water than the pipes feeding it are able to provide.

Water hammer could also be the reason behind banging in the pipes.

Unfortunately there isn’t much you can do to fix this on your own and so it’s easiest to contact a plumber if you suspect this is an issue.

Fixing your Dishwasher

Faulty pumps as well as motors are often responsible for sudden loud sounds emanating from your dishwasher. Luckily these parts can be replaced so you shouldn’t need a whole new dishwasher. You might even be able to to the repair yourself or you may need to call a local engineer.

More Dishwasher Problems:

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