Why is My Dishwasher Making Loud Sounds?

Machines such as a dishwasher are there to be seen and not heard. Plus they are more hygienic than hand washing and when they are finished everything is dried up and ready to use again.

If you are fortunate enough to have a dishwasher the chances are it’s hard to imagine life without it. Furthermore most people would prefer not to the amount of dishes you would be required to do if it breaks. If that happens, you will want to call a dishwasher repair company to repair the appliance.

Do You Own a Rowdy Dishwasher?

It is absolutely normal to notice an array of distinct sounds while your machine is running. The water entering the machine, the motor running, the detergent compartment opening and closing and the buzz of the grinder are all normal sounds.

If you replace your machine these noises are likely to be inconsistent from your old dishwasher, moreover if you have installed a machine for the first time they may not be the sounds you expected.

Dishwasher Sounds Include:

Water Sound

Hearing water gurgling and sloshing about is completely normal, they might sound quite noisy if you are not used to having a dishwasher though they are nothing to worry about.

Water will often produce a hissing sound as it enters the machine and a sloshing or swishing noise as the spray arms spray the water around the drum. The dishwasher will also drain and refill during the cycle.

A Thumping Sound

A thumping sound may happen because of the sprayer hitting into an object that is hanging down or a large plate. Alternatively, it may be the drain line thumping against the wall or cabinets.

Despite the fact that these aren’t noises your machine is designed to make it is easy to sort out with a little rearrangement.

Normal Humming as well as Buzzing Noises

Humming noises are routine for many models. It is the noise the water makes draining out of the machine. The buzzing is a result of the vibration caused by the drain pump and thus is absolutely routine, it may also pause as the pump helps push food debris and water out of the machine.

Buzzing can additionally be a result of the fan that cools the motor while it is working.

Many machines also have a grinder that may produce a humming sound during the cycle.

Beeping When the Cycle Finishes

Beeping sounds when the cycles has finished are absolutely routine despite the fact they could be annoying, particularly if your dishwasher ends its cycle at night. You should be able to switch this noise off on the control panel. Check your manual for details as makes will all be slightly different.

Squealing Noise from a New Dishwasher

A new dishwasher could produce a squealing noise when it is first installed because there is no water in the drum. This may also cause a rattling noise , this can also happen if your dishwasher has been out of action for a period of time.

You can stop this from happening by putting water in the machine before running it for the first time or when you’ve been away.

Abnormal Dishwasher Noises

It’s not unusual to be a little on edge if your machine starts making unusual sounds, however there is usually no cause for concern.

However, if your dishwasher starts making louder than normal or unusual noises this may warrant further investigation, in particular if you’ve had your dishwasher for some time and therefore know how it usually sounds.

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

A Loud or Unusual Grinding Noise

Despite the fact that some dishwashers could make a soft grinding noise as part of their regular cycle if your dishwasher suddenly starts making a loud or unusual grinding sound this is generally not a good sign and needs checking out.

Most of the time the issue will be that something has become stuck in either the waste disposal or the drain impeller, and therefore is knocking into the blades. If you suspect this might be the problem you should pause the cycle and check. If you discover anything, carefully take it out before re-starting the machine.

The other possible issue is that there is insufficient water in the machine, if this is the case you can check the water inlet valve to try to determine the reason the machine is empty.

Irregular Humming, Rattling or Buzzing Sounds

While humming as well as buzzing noises may be completely regular they may also signal a fault. A damaged motor could produce a irregular humming or even shrieking sound, in this case you may need a replacement part.

A damaged motor can also produce a rattling noise.

Rattling noises coming from a dishwasher are most likely caused by dishes or cutlery bashing into one another. However, unusually noisy banging may also be indicative of a plumbing issue.

To check, run an empty cycle and if the rattling sound persists this can indicate a damaged motor.

Beeping Mid-Cycle

Although it is perfectly routine for a machine to beep at the end of the cycle, beeping during the cycle is often your dishwasher 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 have to have a look at your manual.

Knocking, Clunking and Banging Noises

A regular clunking is most likely the result of the spray arm bashing an obstruction inside the dishwasher and therefore may be quickly rectified by moving your dishes. Items hanging down from the racks is the most likely cause of this.

It may be a good idea to check that the arm is able to rotate without obstruction each time you use your machine to prevent this from being an issue as it has a side effect of meaning your dishes don’t get cleaned so well.

Banging, on the other hand, is often an indication of a plumbing problem often referred to as water hammer. The banging sound is related to the water pressure in the pipes and thus often occurs when the valves are opening and closing.

Water hammer may also cause banging in the pipes.

Regrettably there isn’t much you are able to do to fix this without professional help therefore it’s easiest to phone an engineer if you think this is an issue.

Mending your Dishwasher

Broken pumps as well as motors are the most likely cause of strange loud noises coming from your machine. Luckily these parts are replaceable so you shouldn’t need a whole new machine. You might even be able to to the repair on your own or you may wish to call a local repair person.

More Dishwasher Problems:

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