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LG dishwasher is whistling a high pitch tune during washing

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It is difficult to be specific without knowing the model number of your LG dishwasher.

On newer LG models, the most common cause of noises is from debris stuck in the lower filter assembly area. Recommend you remove the lower spray arm and the screws that holds the filter sub-assembly in. After removing the assembly, inspect with a flashlight to search for any debris that is jammed in that area. Also rinse out the filter as best possible to remove any thing you see in there. Reassemble and test.

Posted on Aug 12, 2009

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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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I have a top load fridgidaire washer model fwsc445rfs0. During the wash cycle it makes a high pitched scraping noise.... Struggles also while it winds down before rinse. Bearing maybe?


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Dec 03, 2015 | Washing Machines

1 Answer

Why my dishwasher whistles?


Whistle could be inlet water pump,leak will have to be traced could be from a number of places,poss from pump

Aug 13, 2014 | LG LDF6920ST Stainless Steel 24 in....

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Makes a whistling noise when in use


I had a problem with my LG dishwasher and there was a small stainless steel impeller that they had to replace to stop the high pitch noise. I think this impeller grinds up any food particles. The tech said if one of the veins bend it causes this issue.

Feb 10, 2013 | LG 24 in. LDF 7811 Built-in Dishwasher

1 Answer

My dishwasher is making a high pitch sound during the cycle.


Hi
It is likely that you have a defective wash motor/pump. Depending on the model you have, I know that LG have come up with different motors for some of their models which are around 4 years old. They were unreliable.
LG parts are fairly cheap, but best to get a dishwasher repairer to first verify this and to replace it. Very tricky job.
Ash

Sep 02, 2011 | LG Dishwashers

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Loud squealing noise during wash and rinse cycle


The dishwasher make "loud high-pitched squealing sound" during the rinse cycle that is periodic through out the cycle

Nov 24, 2009 | Frigidaire Dishwashers

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LG makes a high pitched sound during water add cycle


Hello.
The high pitched sound is a definite sign that the water valve in use is failing. The squeal is from a restricted water flow through the valve because it is not opening all the way. You will need to choose cold or hot to narrow down which valve is bad and replace that one.

Jul 15, 2009 | Maytag PAV2300 Top Load Washer

1 Answer

Our LG LDF7920st dishwasher (6 months old)makes a whistling noise


Hey, consider the float assembly!

We bought this dishwasher and ran it for the last 1 1/2 months and it made a grinding and whistling sound from day one (it's supposed to be nearly silent in its operation). Turns out the drain pump was cutting in while the machine was still filling, thereby emptying the wash tub of any water. Then, when the cycle proceeded to wash, the dumb thing had no water and made a horrible noise. So I had to pitch in at least 2-3 litres of hot water, and then it worked quietly! Had to do this every time there was new water intake.

After working with the repairmen - four visits later, we isolated the float assembly as the problem and they set about replacing the part. Turns out the two parts were markedly different. LG HAD INSTALLED an older model float assembly at the factory and it was the problem. The replacement part was the correct float assembly and things worked perfectly after that - thank goodness. No more babysitting the dishwasher.

Don't let anyone tell you the motor assembly needs replacement. I have seen that cop-out 'fix' all over the web. But use deductive reasoning to find out where the problem is in the cycle, and explore this option first - it's a quicker and cheaper fix than replacing the whole motor assembly.

'Mr. Float' as he is now called works like this:
-expels any residual water in the tub from the last wash
-intakes water for the wash or rinse
-whirs 2-3 times prepping for the cycle
-begins to wash, quietly
-expels at the end of the wash or rinse.

He used to:
-expel residual water
-intake new water for wash or rinse
---drain pump would cut in WHILE still filling
-machine would whir once, realize it didn't have enough water
-perform a brief top-up intake shot
-begin to wash and whistle and GRIND (this is where I would have to add the water)
-expels water from wash or rinse, and start all over again.

It's a good dishwasher and it will work, but the right model parts have to be in place!

Jun 27, 2009 | LG Dishwashers

1 Answer

Dishwasher Making Loud High Pitched Noise.


How deep do you want to get into this?It sounds like the wash pump motor bearings that are worn.You can pull the unit out flip it over and wd40 the bearings in the motor or you can replace the bearings.Try to lube them first.

Feb 23, 2008 | Dishwashers

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