Question about LG 24 in. LDS 5811ST Stainless Steel Built-in Dishwasher

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Dishwasher making loud humming noise

My dishwasher has suddenly started making a loud humming noise during the first part of the wash cycle. What could this be? Can I fix it?

It only makes this sound the first 10 mins or so.

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  • Anonymous Nov 10, 2008

    suddenly nakes a loud humming noise when started for first 10 minutes. Help please!

  • bozziedog Feb 13, 2009

    Mine makes a loud humming, moaning sound that started when the wash cycle began. 2 months later it makes this obnoxious noise on all cycles but "dry". The unit only seems to make this noise when the pump is working.

  • Summersite3 Feb 22, 2009

    I have the same problem with mine and I think these LG dishwashers are defective. I purchased an LG Dishwasher Model# LDS5811BB on 9/30/07 from Home Depot and installed by Home Depot. Less than 4 months later it was not working properly and the customer support then was great from LG. It was repaired, they had to replace the motor and the control board and worked ok till last month (Jan 09) and then started making a loud humming noise. LG's Owners Manual book says 1 year labor and 2 year coverage for parts. I called the LG Customer Service number and have got nothing but a runaround. 1st Phone call I talk to the customer support person and he tells me to call the authorized repair dealer and schedule a repair. Ok so I call the repair place and they tell me they need a work order number from LG. 2nd phone call to LG same day, sounded like same representative and he says he will send the work order to the repair place. (Next day), I call repair place, no work order. 3rd phone call to LG and still sounded like the same representative from day before, he says my warranty is out, I tell him same thing 1 year labor, 2 years parts. The representative tells me I need to FAX the page from inside LG's own Owners Manual that shows 1 year labor and 2 years parts, a copy of the reciept, and the customer invoice from Home Depot, which I did. 4th Phone call back same day, representative tells me FAX must come from a different department and it may take a day for them to get it and soon as they get it it they will send a work order to the repair place. That was over two weeks ago. On 02/13/09 I called the repair place again and guess what, still no work order number. I guess LG figures if they can delay me till SEP 09 they can really say my warranty is out. I will never purchase another LG product!!

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The most common cause of the hum/grinding sound, and often poor cleaning - is a blocked filter or debris stuck below that filter.
Pretty easy fix: Get a phillips screwdriver near by. Pull out the lower rack (the upper rack can come out if you pull the little gray thingeys on the front of the upper rails.)
Remove the lower spray arm -- just pull it straight up. Remove nine silver screws from the sump area that holds the filter down. Pull the filter up and out. Rinse the filter as best you can.
While the filter removed, with a flash light inspect all over the sump area - looking for stuff that should not be there and clean it out. Watch out for broken glass!
Replace the filter, screws and the spray arm. Fire it up and check your results!
Good Luck!

Posted on Apr 04, 2009

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