Why is My Dishwasher Making Loud Sounds?

Your Dishwasher is there to save you time and make your life better. 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 everything is dry and ready to use again.

If you are lucky enough to have a dishwasher the probability is it’s difficult to contemplate the idea of not having one. Moreover most people would definitely rather not imagine the mountain of dishes you would need to do if it breaks down. In this case, you will need to hire a dishwasher repair company to fix the appliance.

Do You Own a Rowdy Dishwasher?

It is perfectly routine to hear an assortment of different sounds while your machine is running. The water filling the drum, the motor working, the dishwasher tablet drawer clicking open and the buzz of the grinder are all normal sounds.

If you get a new dishwasher these noises could be inconsistent from your old machine, and if you have recently installed a machine they may not be the noises you were expecting.

Dishwasher Sounds Include:

A Water Sloshing or Swishing Noise

Water sloshing noises are completely regular, they may sound quite intrusive if you are not used to having a dishwasher though they are nothing to worry about.

Water will often make a hissing sound as it pushes through the inlet valve and a sloshing or swishing noise as the spray arms rotate. The dishwasher will also repeat this process each time it runs.

A Pounding Sound

A thumping sound can be de to the sprayer hitting against an object that is hanging down or an oversized dish. Alternatively, it may be the drain pipe bashing into the wall or cabinets.This is more likely if your dishwasher has recently been installed.

Although this isn’t a noise your machine should be making it is not difficult to fix with a little rearrangement.

Routine Humming and Buzzing Noises

Humming noises are routine for plenty of machines. This is the noise the water makes emptying out of the machine. The humming is a result of the vibration caused by the drain pump and thus is perfectly regular, it can also stop and start as the pump may not run continuously.

Buzzing could also be heard as a result of the fan that cools the dishwasher pump motor while it is running.

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

Beeping at the End of the Cycle

Beeping sounds when the cycles has finished are completely regular although they could be annoying, particularly if your machine ends its cycle while you’re in bed. In most cases you can switch the beeping off on the control panel. Check your owners manual for details as models will all be slightly different.

Squealing from a New Dishwasher

A new dishwasher can produce a squealing sounds on first use due to there not being any water in the machine. This may also cause a rattling sound and could also occur if your dishwasher hasn’t been used for a period of time.

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

Worrying Dishwasher Noises

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

That being said, if your dishwasher starts making louder than normal or unusual sounds this may call for further investigation, especially when you’ve had your machine for some time and thus know how it usually sounds.

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 some dishwashers may make a grinding noise as part of their regular cycle if your dishwasher unexpectedly begins to emit a louder than normal or unusual grinding noise this is often a sign of an issue and needs checking out.

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

An alternative possible issue is a lack of water in the machine, if this is the case you can have a look at the water inlet to try to determine the reason the dishwasher doesn’t have enough water.

Abnormal Humming, Rattling or Buzzing Noises

While humming as well as buzzing noises may be perfectly routine they could also indicate a problem. A damaged motor can make a irregular humming or even shrieking noise, if this happens it will invariably need to be replaced.

A faulty pump may also make a rattling sound.

Rattling sounds emanating from a dishwasher are often caused by dishes or cutlery hitting against each other. Nonetheless, particularly noisy thumping can also be a water issue.

To check, run an empty cycle and if the rattling sound continues this could be evidence of a broken pump.

Beeping Before the Cycle is Over

Despite the fact that it is perfectly normal for a machine to beep when it is finished, beeping mid cycle is often your machine telling you there is an error. Many machines will alert you if they are interrupted mid-cycle so that the cycle is paused. Or you can need to consult your owners manual.

Knocking, Clunking and Banging Sounds

A rhythmic thumping is usually due to the sprayer bashing something inside the machine and therefore may be easily rectified by moving your dishes. Items hanging down from the shelves is often the problem.

It may be a good idea to check that the arm is able to rotate freely routinely to prevent 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 more often an indication of a household plumbing problem often referred to as water hammer. The banging sound is related to the water pressure in the pipes and often happens when the dishwasher is demanding more water than the pipes feeding it are able to supply.

Water hammer could also result in rattling in the pipes.

Unluckily there isn’t much you can do to resolve this on your own therefore it’s recommended to phone a plumber if you suspect this is an issue.

Fixing your Dishwasher

Broken pumps as well as 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 a whole replacement dishwasher. You may even be able to replace the part on your own or you could need to phone a local repair person.

More Dishwasher Problems:

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