Why is My Dishwasher Making Loud Sounds?

Your Dishwasher is there to save you time as well as make your life easier. Plus they get better results than washing up by hand and when they are finished everything is dried up and ready to use again.

If you are fortunate enough to have a dishwasher the probability is it’s difficult to contemplate the idea of not having one. Furthermore you would ideally avoid the mountain of dishes that you would have to do if it breaks. If that happens, you’ll need to call a dishwasher repair company to repair the appliance.

Do You Have a Rowdy Dishwasher?

It is completely routine for a dishwasher to make a number of separate noises while running. The water filling the drum, the motor turning, the dishwasher tablet compartment clicking open and the hum of the grinder are all routine noises.

If you replace your machine these noises are likely to be unlike your old dishwasher, moreover if you have recently installed a machine they could not be the noises you were expecting.

Dishwasher Sounds Include:

Water Sound

Water sloshing noises are absolutely normal, these noises may seem quite intrusive to begin with but you will soon get used to them.

Water can regularly produce a hissing sound as it comes through the water inlet valve as well as a sloshing or swishing noise as the spray arms rotate. The machine will also drain and refill several times during the cycle.

A Pounding Sound

A pounding sound may be de to the spray arm hitting into an object that is dangling or an oversized dish. Alternatively, it could be the drain pipe bashing against the wall or cabinets.

Despite the fact that these aren’t noises your dishwasher should be making it is easy to fix with a little adjustment.

Normal Humming and Buzzing Noises

Humming noises are normal for plenty of machines. This is the sound of water pumping out of the machine. The buzzing is a result of the pump vibrating as it operates and is completely regular, it can also stop and start as the pump may not run continuously.

Buzzing can also be heard from the fan that cools the dishwasher pump motor while it is working.

Plenty of machines also have a soft food grinder that can make a buzzing noise intermittently during the cycle.

Beeping When the Cycle Finishes

Beeping noises at the end of the cycle are absolutely normal despite the fact they can be irritating, particularly if your dishwasher ends its cycle in the middle of the night. You should be able to switch the beeping off using the dishwasher controls. Check your owners manual for details as makes will all be slightly different.

Squealing Noise from a New Dishwasher

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

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

Worrying Dishwasher Noises

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

On the other hand, if your machine starts making louder than normal or unusual noises this can call for additional investigation, in particular when you’ve had the dishwasher for a while and therefore know how it usually sounds.

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

A Loud or Unusual Grinding Noise

Although plenty of machines can produce a soft grinding noise as part of their normal operation if your dishwasher suddenly begins to emit a louder than normal or strange grinding sound this is generally not a good sign and thus needs checking out.

The most common cause will be that something is caught in either the the waste disposal or the drain impeller, and therefore is knocking against the blades. in this case you need to stop the machine and have a look. If you find something, remove it carefully before re-starting the machine.

The other potential issue is a lack of water in the machine, if this is the case you can check the water inlet to try to find out why the machine is empty.

Irregular Humming, Rattling or Buzzing Noises

While humming as well as buzzing noises can be absolutely normal they can also signal a fault. A broken motor could make a irregular humming or even shrieking noise, in this case you may need a replacement part.

A damaged motor could also produce a rattling sound.

Rattling noises coming from a dishwasher are often a result of plates and cutlery knocking into one another. Nevertheless, particularly loud rattling can also be a plumbing problem.

If you run an empty cycle and the rattling sound continues this can indicate a broken motor.

Beeping Mid-Cycle

Although it is completely regular for a machine to beep at the end of the cycle, beeping mid cycle is usually your machine indicating there is an error. Many dishwashers will alert you if they are opened half way through the cycle and the cycle is paused. Or you could have to consult your manual.

Knocking, Clunking and Banging Sounds

A regular knocking is usually due to the arm bashing an obstruction inside the machine and can be easily sorted by rearranging your dishes. Items hanging down from the shelves is the most likely cause of this.

It may be a good idea to check that 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 usually a result of a plumbing problem often referred to as water hammer. The banging noise is due to the water pressure in the pipes and thus often happens when the valves are opening and closing.

Water hammer can also cause banging in the pipes.

Unluckily there isn’t much you are able to do to solve this on your own and so it’s easiest to contact an engineer if you suspect this is an issue.

Mending your Dishwasher

Broken pumps and motors are the most likely cause of sudden loud sounds coming from your dishwasher. The good news is these parts are replaceable so you shouldn’t need a whole new machine. You may even manage replace the part yourself or you could need to contact a local engineer.

More Dishwasher Problems:

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