Why is My Dishwasher Making Loud Sounds?

Appliances such as a dishwasher are there to save you time and make your life more efficient. Not to mention the fact that they get better results than washing up by hand and when you open the machine at the end of the cycle 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 hard to imagine the idea of not having one. Furthermore you would prefer not to the mountain of washing up you would need to do if it breaks down. If that happens, you will need to hire a dishwasher repair company to fix the kitchen appliance.

Is Your Dishwasher Noisy?

It is perfectly regular to hear an assortment of separate sounds while your dishwasher is running. The water filling the drum, the motor spinning, the dishwasher tablet compartment opening and closing and the buzz of the grinder are all regular sounds.

If you have a new dishwasher these sounds may be different from your old dishwasher, and if you have recently installed a dishwasher they may not be the sounds you were expecting.

Dishwasher Sounds Include:

A Water Sloshing or Swishing Noise

Hearing water gurgling and sloshing about is perfectly normal, they can appear pretty intrusive to begin with but they are nothing to worry about.

Water will 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 machine will also repeat this process each time it runs.

A Pounding Noise

A pounding noise may happen because of the spray arm bashing into an object that is dangling from the racks or a large plate. It could also be the drain line bashing against the wall or cabinets.

Although this isn’t a noise your dishwasher should be making it is simple to fix with a little rearrangement.

Regular Humming as well as Buzzing Noises

Humming sounds are routine for lots of models. It is the sound of water draining out of the machine. The humming is due to the drain pump vibrating as it operates and is absolutely regular, it could also pause as the pump may not run continuously.

Buzzing may additionally be heard from the fan that cools the motor while it is turning.

Many dishwashers also include a grinder that can produce a buzzing noise intermittently during the cycle.

Beeping When the Cycle Has Finished

Beeping noises at the end of the cycle are absolutely regular despite the fact they may be irritating, especially if your machine finishes its cycle while you’re in bed. In most cases you can turn the beeping off on the dishwasher controls. .

Squealing from a New Dishwasher

A new machine could produce a squealing sounds on first use because there is no water in the drum. This could also cause a rattling sound , this can also happen if your machine hasn’t been used for a while.

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

Abnormal Dishwasher Noises

If you hear strange noises coming from your machine, getting a little uneasy is a very natural reaction though usually, it’s nothing to worry about.

That being said, if there are loud or unusual sounds coming from your dishwasher this may require further investigation, in particular when you’ve had your machine for a while and therefore know how it usually sounds.

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

Loud or Unusual Grinding Sounds

Despite the fact that some dishwashers could produce a soft grinding noise as part of their normal operation if your machine unexpectedly starts making a louder than normal or unusual grinding noise this is often a sign of an issue and thus needs further investigation.

The most likely cause will be that something has got lodged in either the waste disposal or the drain impeller, and is grinding into the blades. in this case you should stop the machine and have a look. If you discover something, remove it carefully before re-starting the machine.

The other potential reason is that there is insufficient water in the dishwasher, if this is the case you should check the water inlet to try to find out why the dishwasher isn’t filling with water.

Abnormal Humming, Rattling or Buzzing Noises

While humming and buzzing sounds may be completely routine they could also be a sign of a problem. A broken pump may produce a high pitched humming or even squealing sound, if this happens it will usually need to be replaced.

A faulty pump can also produce a rattling sound.

Rattling sounds coming from a machine are most likely a result of dishes or cutlery bashing into one another. Nevertheless, particularly noisy thumping can also be indicative of a plumbing issue.

If you run an empty cycle and the rattling sound persists this may indicate a faulty motor.

Beeping Mid-Cycle

Despite the fact that it is absolutely regular for a dishwasher to beep at the end of the cycle, beeping during the cycle is often your dishwasher indicating there is an error. Many dishwashers will alert you if they are interrupted mid-cycle so that the cycle is paused. Or you may have to have a look at the owners manual.

Knocking, Clunking and Banging Sounds

A rhythmical thumping is more often than not due to the spray arm bashing an obstruction inside the machine and can be quickly rectified by rearranging your dishes. Items hanging down from the shelves is the most likely cause of this.

It could be a good idea to check that the arm can spin freely regularly before starting your machine to prevent this from happening as it also means your dishes don’t get cleaned so well.

Banging, however, is more often a sign of a plumbing issue known as water hammer. The banging sound is due to the water pressure in the pipes and thus usually happens when the dishwasher is in need of more water than the pipes feeding it are able to provide.

Water hammer may also cause banging in the plumbing.

Unluckily there isn’t much you can do to fix this on your own and so it’s easiest to contact an engineer if you imagine this is an issue.

Mending your Dishwasher

Broken pumps as well as motors are the most likely cause of sudden loud sounds coming from your machine. Luckily these parts can be replaced so you shouldn’t need to replace your machine. You might even be able to replace the part on your own or you might need to phone a local engineer.

More Dishwasher Problems:

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