Why is My Dishwasher Making Loud Sounds?

Appliances like a dishwasher are there to save you time as well as make your life easier. On top of that they are more hygienic than hand washing and when you open the machine in the morning all the dishes is dry and ready to put away.

If you own a dishwasher the chances are it’s hard to imagine life without it. And most people would definitely rather not imagine the piles of washing up you would have to do if it develops a fault. If that happens, you’ll want to hire a dishwasher repair company to fix the kitchen appliance.

Do You Own a Rowdy Dishwasher?

It is completely normal for your dishwasher to produce a variety of distinct sounds during a cycle. The water entering the machine, the motor spinning, the dishwasher tablet compartment opening and closing as well as the hum of the grinder blades are all routine noises.

If you own a new machine these noises could be unlike your old machine, moreover if you have installed a machine for the first time they could not be the noises you were expecting.

Dishwasher Sounds Include:

The Sound of Water Sloshing or Swishing

Hearing water gurgling and sloshing about is absolutely normal, they might seem rather intrusive if you are not used to having a dishwasher though you will soon get used to them.

Water can in many cases make a hissing noise as it enters the machine as well as a sloshing or swishing sound as the spray arms circulate the water around the drum. The dishwasher will also drain and refill each time it runs.

A Pounding Sound

A thumping sound can be the result of the spray arm bumping into something that is hanging down or an oversized plate. Alternatively, it could be the drain line thumping into the wall or cabinets.This is more likely if your machine has recently been installed.

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

Routine Humming as well as Buzzing Sounds

Humming sounds are regular for many models. This is the noise the water makes draining out of the machine. The humming is a result of the pump vibrating as it operates and thus is completely regular, it may also pause as the pump may not run continuously.

Humming could also be heard from the fan keeps the pump motor cool while it runs.

Plenty of dishwashers also make use of a soft food grinder that may produce a humming noise during the cycle.

Beeping When the Cycle Finishes

Beeping sounds at the end of the cycle are absolutely regular despite the fact they can be irritating, particularly if your dishwasher ends running at night. You should be able to turn this sound off using the control panel. .

Squealing Noise from a New Dishwasher

A new machine may produce a squealing noise on first use due to there not being any water in the drum. This may also cause a rattling sound and may also occur if your dishwasher has been out of action for a period of time.

You can stop this from happening by putting water in the machine before turning it on for the first time or after you’ve been away.

Worrying Dishwasher Noises

It’s not uncommon to get a little uneasy if your dishwasher starts making unusual sounds, however there is usually no cause for concern.

However, if there are louder than usual or unusual noises coming from your machine this may warrant further investigation, especially if you’ve had the machine for some time and know how it usually sounds.

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

Loud or Unusual Grinding Noises

Despite the fact that plenty of dishwashers can produce a soft grinding noise as part of their normal operation if your machine all of a sudden starts making a loud or unusual grinding noise this is generally not a good sign 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 is knocking against the blades. If you suspect this could be the problem you need to stop the machine and check. If you find something, carefully take it out before re-starting the cycle.

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

Abnormal Humming, Rattling or Buzzing Sounds

While humming and buzzing sounds may be perfectly normal they can also signal a fault. A damaged pump may make a irregular humming or even shrieking sound, if this happens it will often need to be replaced.

A faulty pump could also make a rattling sound.

Rattling noises coming from a machine are most likely a result of plates and cutlery bashing against each other. However, particularly noisy thumping may also be a plumbing issue.

If you run an empty cycle and the rattling sound continues this may be evidence of a broken motor.

Beeping Mid-Cycle

Despite the fact that it is absolutely routine for a dishwasher to beep when it is finished, beeping half way through the cycle is usually your dishwasher letting you know there is an error. Many dishwashers will alert you if they are opened mid-cycle so that the cycle is paused. Or you may have to have a look at the manual.

Knocking, Clunking and Banging Noises

A rhythmical thumping is usually the result of the sprayer hitting something inside the machine and thus could be easily rectified by adjusting your dishes. Things hanging down from the racks is the most likely cause of this.

It could be worthwhile checking the arm can 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 more often an indication of a household plumbing issue often referred to as water hammer. The banging sound is related to the water pressure in the pipes and therefore usually happens when the dishwasher is demanding more water than the pipes feeding it are able to supply.

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

Regrettably there isn’t much you can do to resolve this yourself and so it’s best to contact an engineer if you imagine this is an issue.

Fixing your Dishwasher

Damaged pumps and motors are often responsible for sudden loud sounds emanating from your machine. The good news is these parts are replaceable so you shouldn’t need to replace your machine. You may even be able to to the repair on your own or you may wish to phone a local engineer.

More Dishwasher Problems:

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