Why is My Dishwasher Making Loud Sounds?

Appliances like a dishwasher are there to be seen and not heard. On top of that they get better results than hand washing and at the end of the cycle all the dishes is dried up and ready to put away.

If you have a dishwasher the likelihood is it’s unpleasant to imagine life without it. And most people would prefer not to the mountain of dishes that you would have to do if it breaks. In this case, you will need to hire a dishwasher repair company to fix the appliance.

Is Your Dishwasher Noisy?

It is completely regular to pick up an array of different sounds while your machine is running. The water running into the machine, the motor running, the dishwasher tablet compartment clicking open as well as the hum of the grinder are all regular noises.

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

Dishwasher Sounds Include:

A Water Sloshing or Swishing Noise

The noise of water gurgling and sloshing around is perfectly normal, they might sound rather intrusive at first though they are nothing to worry about.

Water will often make a hissing sound as it enters the machine and a sloshing or swishing sound as the spray arms circulate it around the drum. The machine will also drain and refill multiple times during the cycle.

A Pounding Noise

A pounding sound could happen because of the spray arm hitting into something that is dangling from the racks or a large plate. It could also be the drain line bashing into the wall or cabinets.

Although these aren’t noises a dishwasher is designed to make it is not difficult to sort out with a little rearrangement.

Regular Humming and Buzzing Noises

Humming sounds are routine for many machines. This is the sound of water emptying out of the machine. The buzzing is a result of the vibration caused by the drain pump and is perfectly regular, it can also pause as the pump may not run continuously.

Buzzing could additionally be heard from the fan keeps the pump motor cool while it works.

Plenty of dishwashers also include a food disposal grinder that can produce a humming sound during the cycle.

Beeping When the Cycle Has Finished

Beeping sounds when the cycles has finished are perfectly routine despite the fact they may be irritating, particularly if your machine ends running in the middle of the night. In most cases you can switch this sound off on the dishwasher controls. .

Squealing from a New Dishwasher

A new machine may produce a squealing noise the first few times it is run because there is no water in the drum. This can also cause a rattling noise , this may also happen if your dishwasher hasn’t been operated for a period of time.

You can avoid this by adding about a quart of water to the dishwasher before running it for the first time or when you’ve been away.

Irregular Dishwasher Noises

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

However, if there are louder than usual or unusual sounds coming from your dishwasher this could require additional investigation, especially if you’ve had the machine for a while and 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

Although many dishwashers can produce a soft grinding noise as part of their normal cycle if your machine unexpectedly begins to emit a louder than normal or unusual grinding sound this is generally not a good sign and needs further investigation.

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

An alternative potential cause is a lack of water in the drum, in which case, you can have a look at the water inlet to try to find out why the machine is empty.

Irregular Humming, Rattling or Buzzing Sounds

While humming as well as buzzing noises may be completely regular they can also indicate a problem. A broken motor may produce a high pitched humming or even squealing noise, in this case you may need a replacement part.

A faulty pump can also produce a rattling sound.

Rattling noises deriving from a machine are often caused by dishes and cutlery bashing against each other. Nevertheless, particularly noisy rattling can also be a plumbing problem.

To check, run an empty cycle and if the rattling sound is still there this could be evidence of a damaged pump.

Beeping During the Cycle

Although it is absolutely routine for a dishwasher to beep at the end of the cycle, beeping during the cycle is often your machine telling you there is a fault. Many dishwashers will alert you if they are interrupted half way through the cycle so that the cycle is paused. Or you may need to consult your owners manual.

Knocking, Clunking and Banging Sounds

A regular knocking is most likely due to the sprayer bashing something inside the dishwasher and thus may be easily rectified by adjusting your dishes. Things descending from the racks is the most likely cause of this.

It can be a good idea to check that the arm can spin without obstruction regularly before starting your machine to stop this from happening as it has a side effect of meaning your dishes aren’t being cleaned effectively.

Banging, however, is more often a result of a household plumbing issue known as water hammer. The banging sound is due to the water pressure in the pipes and thus often occurs when the valves are opening and closing.

Water hammer could also cause banging in the plumbing.

Unfortunately there isn’t much you are able to do to solve this without professional help therefore it’s easiest to call a plumber if you think this is an issue.

Mending your Dishwasher

Faulty pumps or motors are often responsible for unusual loud sounds emanating from your dishwasher. The good news is these parts can be replaced so you shouldn’t need to replace your dishwasher. You might even manage replace the part on your own or you could wish to contact a local repair person.

More Dishwasher Problems:

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