Why is My Dishwasher Making Loud Sounds?

Machines such as a dishwasher are designed to make life easier. Plus they get better results than washing up by hand and when you open the machine at the end of the cycle everything is already dry and ready to put away.

If you own a dishwasher the likelihood is it’s unpleasant to imagine the idea of not having one. Furthermore you would prefer not to the amount of dishes that you would have to do if it breaks down. In this case, you’ll want to hire a dishwasher repair company to repair the kitchen appliance.

Do You Use a Noisy Dishwasher?

It is perfectly routine to pick up a number of different noises while your machine is running. The water running into the machine, the motor turning, the dishwasher tablet drawer opening and closing as well as the hum of the grinder blades are all regular sounds.

If you replace your machine these sounds may be inconsistent from your old machine, and if you have recently installed a dishwasher they might not be the noises you expected.

Dishwasher Sounds Include:

Water Sound

Hearing water gurgling and sloshing about is absolutely routine, these sounds can seem pretty intrusive if you are not used to having a dishwasher though you will soon get used to them.

Water can often make a hissing sound as it enters the machine and a sloshing or swishing sound as the spray arms rotate. The dishwasher will also repeat this process multiple times each time it runs.

A Pounding Sound

A pounding noise could be de to the sprayer hitting against an object that is hanging down from the racks or a large plate. Alternatively, it could be the drain line banging into the wall or cabinets.

Despite the fact that these aren’t noises a machine is designed to make it is not difficult to fix with a little adjustment.

Routine Humming and Buzzing Sounds

Humming sounds are routine for plenty of models. This is the noise the water makes emptying out of the dishwasher. The buzzing is due to the vibration caused by the drain pump and thus is absolutely routine, it may also stop and start as the pump helps push food debris as well as water out of the machine.

Humming may additionally be heard as a result of the fan that cools the pump motor while it is running.

Many dishwashers also include a grinder that may make a humming sound during the cycle.

Beeping at the End of the Cycle

Beeping noises when the cycles finishes are perfectly normal although they may be annoying, especially if your machine finishes its cycle in the middle of the night. In most cases you can turn this sound off using the control panel. .

Squealing from a New Dishwasher

A new machine could make a squealing noise the first few times it is run because there is no water in the machine. 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 dishwasher before turning it on for the first time or when you’ve been away.

Abnormal Dishwasher Noises

It’s not unusual to feel a little uneasy if your machine starts making strange sounds, however there is usually nothing to worry about.

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

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

A Loud or Unusual Grinding Noise

Despite the fact that some machines may make a grinding noise as part of their normal operation if your machine unexpectedly begins to emit a louder than normal or strange grinding noise this is generally not a good sign and thus needs further investigation.

The most common cause will be that something is caught in either the the waste disposal or the drain impeller, and is knocking against the blades. in this case you should pause the cycle and have a look. If you find anything, remove it carefully before re-starting the dishwasher.

An alternative possible 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 the reason the machine is empty.

Worrying Humming, Rattling or Buzzing Noises

While humming as well as buzzing sounds can be absolutely routine they could also be a sign of an issue. A damaged motor can make a loud humming or even squealing sound, if this happens it will invariably need to be replaced.

A broken pump may also make a rattling noise.

Rattling noises deriving from a dishwasher are most likely a result of plates and cutlery bashing into one another. However, unusually loud rattling may also be a water issue.

To check, run an empty cycle and if the rattling sound continues this can be evidence of a damaged motor.

Beeping Mid-Cycle

Although it is perfectly routine for a machine to beep when it is finished, beeping half way through the cycle is usually your dishwasher telling you 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 need to have a look at the manual.

Knocking, Clunking and Banging Noises

A regular thumping is usually due to the spray arm bashing something inside the machine and therefore could be easily sorted by adjusting your dishes. Things descending from the racks is often the problem.

It can be a good idea to check that the arm is able to spin without obstruction each time you use your machine to prevent this from being an issue as it also means your dishes aren’t being cleaned effectively.

Banging, however, is more often a sign of a plumbing issue often referred to as water hammer. The banging sound is related to the water pressure in the pipes and often happens when the valves are opening and closing.

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

Unfortunately there isn’t much you can do to fix this yourself therefore it’s easiest to contact a plumber if you suspect this is an issue.

Fixing your Dishwasher

Broken pumps and motors are often responsible for unusual loud noises coming from your machine. The good news is these parts are replaceable so you shouldn’t need to replace your machine. You might even manage to the repair yourself or you may wish to phone a local engineer.

More Dishwasher Problems:

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