Why is My Dishwasher Making Loud Sounds?

Your Dishwasher is designed to make life easier. Not to mention the fact that they are more hygienic than washing up by hand and when you open the machine in the morning all the dishes is dried up and ready to put away.

If you are lucky enough to use a dishwasher the chances are it’s unpleasant to remember life without it. Furthermore you would prefer not to the piles of dishes you would have to do if it breaks down. If that happens, you will need to hire a dishwasher repair company to repair the kitchen appliance.

Is Your Dishwasher Too Loud?

It is absolutely normal to pick up a variety of separate sounds while your dishwasher is running. The water running into the machine, the motor turning, the dishwasher tablet compartment clicking open as well as the buzz of the soft food grinder are all routine sounds.

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

Dishwasher Sounds Include:

A Water Sloshing or Swishing Noise

Water sloshing sounds are absolutely regular, they may seem rather intrusive to begin with although they are nothing to worry about.

Water will in many cases produce a hissing sound as it pushes through the water inlet valve as well as a sloshing or swishing sound as the spray arms circulate the water around the machine. The machine will also drain and refill several times each time it runs.

A Thumping Sound

A pounding sound may be de to the sprayer hitting against something that is hanging down or a large plate. It could also be the drain line bashing against the wall or cabinets.

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

Normal Humming and Buzzing Sounds

Humming noises are regular for many models. It is the sound of water draining out of the dishwasher. The humming is a result of the vibration caused by the drain pump and is absolutely normal, it may also stop and start as the pump helps push food debris as well as water out of the machine.

Humming can also be heard as a result of the fan keeps the dishwasher motor cool while it runs.

A lot of machines also have a grinder that may produce a humming noise intermittently while the dishwasher is on.

Beeping When the Cycle Has Finished

Beeping sounds when the cycles finishes are completely regular despite the fact they can be annoying, particularly if your machine finishes its cycle while you’re in bed. In most cases you can turn this noise off using the dishwasher controls. Check your owners manual for details as makes will all be slightly different.

Squealing Sound from a New Dishwasher

A new machine could make a squealing sounds on first use due to there not being any water in the drum. This can also cause a rattling sound and can also occur if your dishwasher has been out of action for a while.

You could stop this from happening by putting water in the drum before running it for the first time or when you’ve been away.

Abnormal Dishwasher Noises

If you hear strange noises coming from your dishwasher, getting a little uneasy is a very normal reaction although usually, it’s there’s no cause for concern.

However, if your dishwasher starts making louder than normal or unusual sounds this may warrant additional investigation, especially when you’ve had the machine for some time and thus know how it usually sounds.

Don’t forget, if you are going to start taking your machine apart you should always turn off the power first.

Loud or Unusual Grinding Noises

Despite the fact that some dishwashers may produce a grinding noise as part of their normal cycle if your dishwasher suddenly develops a louder than normal or strange grinding sound this is often a sign of an issue and thus needs further investigation.

The most likely cause will be an item such as an olive stone or corn kernel has become stuck in either the waste disposal or the drain impeller, and is knocking against the blades. If you suspect this could be the problem you need to pause the cycle and check. If you find something, carefully remove it before re-starting the dishwasher.

Another 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 why the machine isn’t filling with water.

Abnormal Humming, Rattling or Buzzing Noises

While humming and also buzzing sounds could be absolutely routine they can also be a sign of a fault. A faulty pump may produce a high pitched humming or even shrieking noise, in this case you may need a replacement part.

A damaged pump could also produce a rattling noise.

Rattling noises emanating from a dishwasher are most likely caused by dishes or cutlery hitting into one another. Nevertheless, particularly noisy banging may also be a plumbing issue.

To check, run an empty cycle and if the rattling sound persists this could indicate a damaged motor.

Beeping Before the Cycle is Over

Although it is perfectly routine for a machine to beep at the end of the cycle, beeping during the cycle is often your dishwasher letting you know there is a fault. Many dishwashers will alert you if they are opened mid-cycle so that the cycle is paused. Or you could have to have a look at your manual.

Knocking, Clunking and Banging Sounds

A rhythmical clunking is more often than not due to the sprayer bashing something inside the machine and can be easily fixed by rearranging your dishes. Things hanging down from the racks is the most likely cause of this.

It could be worthwhile checking the arm is able to rotate without obstruction each time you use your machine to stop this from happening as it also means your dishes aren’t being cleaned effectively.

Banging, on the other hand, is more often an indication of a plumbing problem often referred to as water hammer. The banging sound is due to the water pressure in the pipes and therefore often occurs when the valves are opening and closing.

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

Unluckily there isn’t much you are able to do to solve this without professional help and so it’s recommended to phone an engineer if you imagine this is an issue.

Mending your Dishwasher

Faulty pumps or motors are the most likely cause of strange loud noises coming from your dishwasher. The good news is these parts can be replaced so you shouldn’t need to replace your machine. You could even be able to replace the part yourself or you might need to phone a local repair person.

More Dishwasher Problems:

  • Dishwasher Leaking
  • Dishwasher Not Turning On
  • Dishwasher Not Draining
  • Dishwasher Not Drying
CLICK-TO-CALL