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Pdw9280n20ss After a power outage of ten minutes, the dish washer is making a high frequency noise. Whistling noise ! How do I solve it ?

Posted by Anonymous on

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6ya6ya
  • 2 Answers

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

localwonder
  • 6784 Answers

SOURCE: Power outage occurred. Upon power back on Dishwasher has high pitch tone and no lights and it will not do anything but make sound.

A power surge has occurred unfortunately. this surge has fried the control module and, you will need to replace this module asap.

I would check the motor as well. it may have took a hit as well. test the continuity of the element as well.

Posted on Jun 03, 2009

  • 1382 Answers

SOURCE: high oitch noise during wash

As motor bearings wear out, they can become quite loud when the motor runs. They wear out quickly if they frequently get wet, because the water washes away the motor bearing grease. Bearings can get wet if the spin seal is defective. Then there will also be water leaking onto the floor beneath the dishwasher. Replace the seal if it leaks (read about the main tub seal in the "It leaks" section, later).If, from beneath the dishwasher, you can see a round, plastic disc that's mounted to the top of the motor (a "slinger"), it may have broken free of the motor shaft. If so, it could be rattling around the shaft while the motor is running. If that's the problem, you need to replace the motor.
If the heater fan bearings are rusted or worn, they may squeal, or scrape loudly during the drying cycle. If this is the problem, replace the fan motor. Alternatively, the fan blade may be loose. If so, you need to replace it.

Posted on May 04, 2010

  • 1 Answer

SOURCE: 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!

Posted on Jun 02, 2011

chrispolkele
  • 4342 Answers

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    SOURCE: makes noise during wash cicles and dishes are not cleaned

    Hi Kenneth Cho - I will suggest verifying that there is enough water pressure coming into the unit. Is the unit making a grinding noise? If it is, then the dishwasher seems to have a defective drain motor. When was the last time the filter was cleaned? Do you noticed if the spray arm will rotate freely or if it is damaged? If so, you might have to remove and replace the spray arm assemblies. If any proves to be ineffective, it could possibly have a communication problem coming from the main control board, I would suggest contacting a professional technician to diagnose the unit accurately.

    Posted on Nov 28, 2012

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