Why is My Dishwasher Making Loud Sounds?

Appliances like a dishwasher are there to save you time as well as make your life easier. Not to mention the fact that they get better results than hand washing and when you open the machine at the end of the cycle all the dishes is already dry and ready to use again.

If you are lucky enough to have a dishwasher the likelihood is it’s hard to imagine life without it. And most people would ideally avoid the piles of dishes that you would need 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 distinct noises during a cycle. The water entering the machine, the motor spinning, the dishwasher tablet compartment clicking open and the noise of the soft food grinder are all normal noises.

If you own a new machine these noises may be unlike your old machine, and if you have recently installed a machine they may not be the noises you expected.

Dishwasher Sounds Include:

Water Sound

Water sloshing noises are completely normal, these sounds may seem pretty noisy at first though they are nothing to worry about.

Water will in many cases produce a hissing noise as it pushes through the inlet valve and a sloshing or swishing sound as the spray arms circulate the water around the machine. The dishwasher will also repeat this process during the cycle.

A Thumping Noise

A pounding noise can be the result of the spray arm hitting against something that is hanging down or an oversized dish. Alternatively, it may be the drain line thumping into the wall or cabinets.

Although this isn’t a noise a machine should be making it is easy to rectify with a little adjustment.

Regular Humming and Buzzing Sounds

Humming noises are regular for plenty of machines. It is the noise the water makes pumping out of the dishwasher. The humming is due to the drain pump vibrating as it operates and thus is perfectly normal, it can also pause as the pump may not run continuously.

Buzzing may additionally be a result of the fan keeps the motor cool while it runs.

Plenty of machines also have a food disposal grinder that may produce a humming sound intermittently during the cycle.

Beeping at the End of the Cycle

Beeping sounds when the cycles has finished are absolutely regular although they may be irritating, particularly if your machine ends running while you’re in bed. You should be able to turn the beeping off on the control panel. .

Squealing Sound from a New Dishwasher

A new machine could make a squealing noise when it is first installed because there is no water in the drum. This could also cause a rattling noise and may also occur if your machine has been out of action for a period of time.

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

Irregular Dishwasher Noises

It’s not unusual to be a little on edge if your dishwasher starts making funny noises, however there is usually no cause for concern.

That being said, if your dishwasher starts making louder than normal or unusual sounds this could call for further investigation, in particular if you’ve had your machine for a while and 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.

A Loud or Unusual Grinding Noise

Despite the fact that many machines may produce a soft grinding noise as part of their routine operation if your dishwasher suddenly begins to emit a louder than normal or strange grinding sound this is often a sign of an issue and 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 therefore is knocking into the blades. in this case you should pause the cycle and check. If you find anything, remove it carefully before re-starting the cycle.

The other potential issue is a lack of water in the drum, in which case, you can check the water inlet to try to find out the reason the machine is empty.

Abnormal Humming, Rattling or Buzzing Noises

While humming and also buzzing noises can be absolutely regular they may also signal a fault. A broken pump may make a loud humming or even squealing noise, in this case you may need a replacement part.

A broken pump could also make a rattling noise.

Rattling sounds emanating from a machine are most likely caused by dishes or cutlery hitting into one another. Nevertheless, particularly loud banging may also be indicative of a plumbing problem.

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

Beeping Mid-Cycle

Despite the fact that it is absolutely regular for a dishwasher to beep at the end of the cycle, beeping mid cycle is usually your dishwasher letting you know there is an error. Many machines will alert you if they are opened half way through the cycle and the cycle is paused. Or you could have to have a look at the manual.

Knocking, Clunking and Banging Sounds

A rhythmic thumping is more often than not due to the sprayer hitting an obstruction inside the dishwasher and therefore could be easily fixed by moving your dishes. Items dangling from the shelves is the most likely cause of this.

It could be worthwhile checking the arm can turn without obstruction routinely to stop this from being an issue as it has a side effect of meaning your dishes don’t get cleaned so well.

Banging, on the other hand, is often a result of a household plumbing issue known as water hammer. The banging noise is due to the water pressure in the pipes and usually occurs when the dishwasher is demanding more water than the pipes feeding it can provide.

Water hammer can also cause banging in the pipes.

Regrettably there isn’t much you are able to do to resolve this yourself therefore it’s easiest to contact a plumber if you think this is the problem.

Fixing your Dishwasher

Faulty pumps or motors are often responsible for sudden loud noises emanating from your machine. The good news is these parts can be replaced so you shouldn’t need a whole replacement dishwasher. You might even manage replace the part yourself or you could wish to call a local engineer.

More Dishwasher Problems:

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