Why is My Dishwasher Making Loud Sounds?

Machines such as a dishwasher are designed to make life easier. Not to mention the fact that they are more hygienic than washing up by hand and when you open the machine at the end of the cycle all the dishes is dried up and ready to put away.

If you have a dishwasher the probability is it’s hard to remember the idea of not having one. And most people would ideally avoid the amount of washing up you would have to do if it breaks down. In this case, you’ll want to hire a dishwasher repair company to fix the appliance.

Is Your Dishwasher Too Loud?

It is absolutely normal for your dishwasher to make a number of different sounds while running. The water filling the machine, the motor working, the dishwasher tablet compartment opening and closing as well as the buzz of the grinder are all routine noises.

If you replace your dishwasher these sounds could be different from your old machine, moreover if you have recently installed a dishwasher they might not be the sounds you expected.

Dishwasher Sounds Include:

A Water Sloshing or Swishing Noise

The noise of water gurgling and sloshing about is completely normal, these noises might appear quite intrusive to begin with though they are nothing to worry about.

Water will in many cases produce a hissing noise as it enters the machine as well as a sloshing or swishing noise as the spray arms spray the water around the machine. The dishwasher will also drain and refill multiple times during the cycle.

A Pounding Noise

A thumping sound may be de to the spray arm hitting into an object that is hanging down from the racks or a large dish. It could also be the drain pipe bashing against the wall or cabinets.

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

Normal Humming and Buzzing Sounds

Humming noises are normal for plenty of machines. It is the sound of water emptying out of the machine. The humming is a result of the vibration caused by the drain pump and is completely normal, it can also pause as the pump helps push food debris as well as water out of the machine.

Humming may also be a result of the fan keeps the dishwasher motor cool while it works.

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

Beeping at the End of the Cycle

Beeping sounds when the cycles finishes are perfectly normal although they can be irritating, particularly if your machine ends its cycle while you’re in bed. You should be able to switch the beeping off using the dishwasher controls. Check your owners manual for instructions as makes will vary.

Squealing from a New Dishwasher

A new machine can make a squealing sounds on first use because there is no water in the drum. This may also cause a rattling noise , this can also happen if your machine hasn’t been used for a period of time.

You can avoid this by adding about a quart of water to the dishwasher before turning it on for the first time or after you’ve not used it for a while.

Irregular Dishwasher Noises

If you notice strange noises coming from your dishwasher, getting a little uneasy is a very natural reaction although usually, it’s nothing to worry about.

That being said, if your dishwasher starts making louder than normal or unusual noises this could warrant further investigation, in particular if you’ve had the machine for some time and thus know how it usually sounds.

Just remember, always turn the power off to your machine before taking it apart.

Loud or Unusual Grinding Sounds

Although many dishwashers can produce a soft grinding noise as part of their normal operation if your machine unexpectedly begins to emit a loud or unusual grinding sound this is often a sign of an issue and needs checking out.

Most of the time the reason will be an item such as an olive stone or corn kernel has become lodged 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 stop the machine and check. If you discover something, remove it carefully before re-starting the dishwasher.

The other potential cause is a lack of water in the machine, in which case, you can check the water inlet valve to try to determine why the machine doesn’t have enough water.

Worrying Humming, Rattling or Buzzing Sounds

While humming as well as buzzing noises may be perfectly normal they can also indicate a problem. A faulty pump may make a loud humming or even shrieking noise, if this happens it will usually need to be replaced.

A broken pump may also produce a rattling sound.

Rattling sounds emanating from a machine are usually a result of plates or cutlery bashing into one another. Nevertheless, particularly loud banging may also be indicative of a water problem.

If you run an empty cycle and the rattling sound persists this could indicate a damaged pump.

Beeping Mid-Cycle

Although it is absolutely normal for a machine to beep at the end of the cycle, beeping during the cycle is usually your machine indicating there is a fault. Many machines will beep if they are interrupted before they are finished so that the cycle is paused. Or you can need to have a look at your manual.

Knocking, Clunking and Banging Sounds

A regular knocking is most likely due to the sprayer hitting an obstruction inside the machine and can be quickly sorted by adjusting your dishes. Things dangling from the racks is the most likely cause of this.

It may be a good idea to check that the arm is able to spin freely each time you use your machine to stop this from being an issue as it has a side effect of meaning your dishes aren’t being cleaned effectively.

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

Water hammer could also be the reason behind banging in the plumbing.

Unfortunately there isn’t much you can do to solve this yourself and so it’s recommended to call a plumber if you imagine this is the problem.

Mending your Dishwasher

Faulty pumps or motors are often responsible for unusual loud sounds coming from your machine. The good news is these parts can be replaced so you shouldn’t need a whole replacement machine. You could even be able to 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