Our LG dishwasher started making a very high pitched whistle about 6 months after we got it. The noise seems to be coming from the bottom of the dishwasher. I have pulled out the arms and cleaned them thoroughly (there was nothing in them) and have inspected the seals and they look good. Any ideas?
Top rack must be pushed firmly in so rotating sprayer is mated to the back and sealed otherwise water during rinse cycle will leak causing a high pitched whistle. Also check to make sure there is no food debris between seals. This solved my problem.
First a suggestion...try this guys solution with the impeller blade or ordering a different part. http://forum.appliancepartspros.com/dishwasher-repair/318842-high-pitched-squel.html Now the rant...NEVER BUYING AN LG ANYTHING AGAIN!!!! Just talked to LG customer service they are worthless. I have the LDS5811 with the same problem. If you aren't going to man up and back your product when there are major flaws I don't want to buy from you. I have spent 250 bucks servicing this unit and it is only 4 years old RIDICULOUS. LG you better get your act together. I am not going to buy another LG appliance unless they start owning up to their faulty manufacturing. This dishwasher was not cheap when I bought it and has been nothing but a head ache. First the wiring harness got loose and shorted the board, because they embedded the wiring in the insulation in the door. Now this stupid noise that tortures any animal within a mile. My home warranty won't fix it "till it breaks." Back into ear purgatory my family goes till I can get this part.
The spindle on the motor passes through a rubber seal. This seal just needs a bit of grease (I used white lithium grease). See video here for motor removal on older models (with chopper blade). You will see the rubber seal the motor spindle passes through. The impeller mounts on this spindle. Newer models with the filter inside the bottom of the dishwasher are a bit more difficult and I can't find any videos. However, the problem is the same - lack of grease on the seal. I have done this with two models (one with chopper blade and one with filter) and problem was solved).
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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.
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.
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!
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.
try washing on hottest cycle it may be the seal in the spray pump somethimes the rinse aid can put a glaze on the seal if that doesnt work you can replace just the front part of the motor( in australia) dont know where you are.
A loud high pitch whine while running the dishwasher means that there is something caught in the chopper assembly. To get to the chopper assembly you need to take the racks out and take the pump apart from the inside of the dishwasher. The chopper assembly looks like a metal grate with holes in it. And it might not even be stuck in the grate but somewhere in the pump area due to the water being pumped out, so the best idea is to take the whole thing apart and clean everywhere. However I do not recommend doing this unless you are completely certain you will remember where the screws and gaskets go, otherwise you risk damaging your pump or house from a leak or improper installation. You have been warned.
the arms are only turned by water coming out of them thro angled jets, they are not electrically driven. the noise will be coming from the circulating pump, probably one of the bearings. no cure except to replace