Why is My Dishwasher Making Loud Sounds?

Home Appliances such as a dishwasher are designed to make life easier. Plus they get better results than washing up by hand and at the end of the cycle all the dishes is dried up and ready to use again.

If you are lucky enough to own a dishwasher the chances are it’s unpleasant to remember the idea of not having one. Moreover you would ideally avoid the piles of washing up you would be required to do if it breaks down. If that happens, you will want to call a dishwasher repair company to fix the appliance.

Do You Use a Noisy Dishwasher?

It is perfectly normal for a dishwasher to produce a variety of different sounds while running. The water running into the machine, the motor turning, the detergent drawer clicking open as well as the hum of the grinder blades are all regular sounds.

If you replace your dishwasher these sounds could be inconsistent from your old machine, and if you have installed a machine for the first time they could not be the sounds you were expecting.

Dishwasher Sounds Include:

Water Sound

Water sloshing noises are perfectly normal, these sounds may appear quite noisy if you are not used to having a dishwasher though you will soon get used to them.

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

A Pounding Noise

A thumping sound could be the result of the spray arm hitting into an object 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 these aren’t noises a machine should be making it is simple to sort out with a little rearrangement.

Regular Humming and Buzzing Sounds

Humming noises are routine for many models. This is the sound of water draining out of the machine. The buzzing is a result of the vibration caused by the drain pump and thus is completely normal, it could also stop and start as the pump helps push food debris and water out of the machine.

Buzzing can also be a result of the fan keeps the motor cool while it works.

A lot of dishwashers also include a grinder that could produce a buzzing noise during the cycle.

Beeping at the End of the Cycle

Beeping sounds when the cycles finishes are absolutely regular although they can be annoying, particularly if your machine ends its cycle at night. You should be able to switch the beeping off using the control panel. .

Squealing Noise from a New Dishwasher

A new machine could make a squealing noise on first use due to there not being any water in the drum. This may also cause a rattling sound , this can also happen if your dishwasher hasn’t been used for a period of time.

You may avoid this by adding about a quart of water to the machine before turning it on for the first time or when you’ve been away.

Irregular Dishwasher Noises

If you notice unusual noises coming from your machine, getting a little on edge is a very normal reaction although usually, it’s there’s no cause for concern.

On the other hand, if your machine 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 know what is normally sounds like.

Don’t forget, always turn the power off to your machine before taking it apart.

A Loud or Unusual Grinding Noise

Despite the fact that plenty of dishwashers may make a soft grinding noise as part of their normal cycle if your machine suddenly begins to emit a louder than normal or unusual grinding sound this is not considered a good sign and needs further investigation.

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 into the blades. in this case you need to stop the machine and have a look. If you find anything, carefully remove it before re-starting the cycle.

An alternative potential reason is that there is insufficient water in the machine, in which case, you can have a look at the water inlet valve to try to determine why the dishwasher is empty.

Worrying Humming, Rattling or Buzzing Sounds

While humming and also buzzing noises may be perfectly routine they could also signal an issue. A faulty pump could produce a high pitched humming or even shrieking sound, if this happens it will usually need to be replaced.

A damaged motor can also produce a rattling noise.

Rattling noises emanating from a machine are often caused by dishes and cutlery knocking against each other. Nevertheless, unusually noisy banging can also be indicative of a plumbing issue.

If you run an empty cycle and the rattling sound continues this could be evidence of a damaged pump.

Beeping Mid-Cycle

Although it is absolutely normal for a machine to beep when it is finished, beeping mid cycle is commonly your machine indicating there is an error. Many machines will beep if they are interrupted half way through the cycle and the cycle is paused. Or you may need to consult the manual.

Knocking, Clunking and Banging Noises

A rhythmic clunking is most likely the result of the arm bashing an obstruction inside the dishwasher and could be quickly fixed by moving your dishes. Items descending from the shelves is the most likely cause of this.

It could be worthwhile checking the arm can turn freely routinely to prevent this from being an issue as it also means your dishes don’t get cleaned so well.

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

Water hammer may also cause banging in the pipes.

Unfortunately there isn’t much you are able to do to fix this yourself and so it’s best to call an engineer if you imagine this is an issue.

Fixing your Dishwasher

Broken pumps and motors are the most likely cause of unusual loud sounds coming from your dishwasher. The good news is these parts are replaceable so you shouldn’t need to replace your dishwasher. You could even manage to the repair on your own or you could need to phone a local engineer.

More Dishwasher Problems:

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