Question about LG 24 in. LDF 7811 Stainless Steel Built-in Dishwasher

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Later LG model, I don't remember # upper arm doesn't spray/rotate, just trickles water

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The Lg D/washers normally have a fascility that allows one to choose either the upper arm or the bottom arm or both to run as you choose. there is an actuator that can stick which would cause this problem. Otherwise simply, your rotor needs a good clean.

Posted on Sep 24, 2009

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Posted on Jan 02, 2017

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1 Answer

I have an LG model LDS4821 dishwasher that quit washing clean. Top rack is the dirtiest. Water is hot and bottom drain is clean.


The most likely cause is a blocked or clogged wash arm. Many times when the wash stops the debris blocking the spray will back away. The holes in the arm are aimed to cause the arm to rotate. The clogged hole is usually an outer diameter hole which provides the force for the arm to rotate.

Some upper end washers have a blocked arm sense to alert when arm is blocked.

Careful not to deform the geometry of the hole when removing the debris. Tweezers work the best.



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26281729-v4uvew3xjjdpgmn3ctj2lcyg-4-2.jpg Hope this helps?

Sep 13, 2016 | LG Dishwashers

1 Answer

Why is the top spray arm not turning


All of the water coming to the upper spray arm comes through the feed tube. If the feed tube is blocked or the probe flapper is hung open, water will not flow properly to the upper spray arm. Be sure that when you push in the upper rack the manifold probe is in position in the feed tube. Try adding more water in the tub to see if the upper spray arm starts rotating. Other possibilities; low water charge, cracked spray arm & poor wash pump performance.

Jul 28, 2016 | Dishwashers

1 Answer

Why doesn't upper spray arm function properly?


A couple of scenarios could cause this problem but the simplest might be the way the dishwasher is loaded. The upper spray arm rotates when water is pumped through the vertical supply tube and into the arm. Make sure that you are not loading the lower rack with items that interfere with the rotation of the upper arm rotor. It might also be a good idea to verify that the feed tube that goes to the spray arm is securely connected to the vertical supply tube.

Dec 02, 2015 | Kenmore Dishwashers

1 Answer

Siemans dishwasher model SE55A560GB/42. Upper rotating spray bar not turning but botton spray bar is rotating. Dishes are left with a gritty feel to them.


Check that the arm rotates freely when spun by hand, then check that the arm outlet jets at the trailing end of the arms are not blocked with food particles and other solid matter. This often happens and the arm is unable to turn because the water jet that is supposed to drive the arm does not have the force to rotate it with the result is that the upper dishes do not get enough water and chemicals. It may also cause water to continue dripping onto dried dishes after the the drying cycle has stopped.

Apr 13, 2011 | Dishwashers

1 Answer

LG model LDS4821ST.... Top and Upper spray arms arn't rotating.


I have an LG LDF8922ST model with the same exact problem (16 months old as well). I think you are right about the vario spray system. Seems like the repair guys that come out are clueless and get very little assistance from LG customer assistance. I will never buy another LG product again.

May 28, 2010 | LG 24" XL Tall Tub Built-In Dishwasher -...

1 Answer

My frigidaire ultra quiet spray arm doe's not move.Water trickles out the holes,no pressure.


water does not spray on the top arm until a later cycle...only one arm spins at a time... a fridgidare thing

May 11, 2010 | Frigidaire 24 in. FDB126RB Built-in...

1 Answer

I have an LG model LG8812st dishwasher and the spray nozzle under the top rack does not rotate. It turns freely by hand but it appears there is no water geting to it through the connection on the rear...


Either the pump is not able to pump due to clogged pump or there is not enough water in the tub after filling to get up to the upper spray arm.

Sep 05, 2009 | Dishwashers

1 Answer

Spray Arms won't rotate


good day,
hope this link below will solve your problem.

kitchen appliances

Jul 16, 2009 | KitchenAid Architect? II U SERIES KUDS03ST...

2 Answers

LG LDS5811WW Low pressure out of spray arms


On the LG LDF xxxx dishwasher family, the Vario feature uses a motor/check valve to switch between "full power" cleaning from _either_ the lower or the upper spray arms, never at the same time. So, not seeing the upper arm spin during the lower arm spinning is standard operating procedure.

But back to your problem. Step one would be to remove the filter assembly again and make certain that there is nothing (debris, broken glass) blocking the white areas where the check valve rotates to switch between upper/lower spray arms. A blockage there ~could~ cause impotent spraying/cleaning.

If there is no blockage and the impeller remains in good shape, suspect a failing wash pump motor. Try to isolate the noise to that motor.

Watch for error codes on the display and report back what you find, OK?

Good Luck!

May 14, 2009 | LG 24 in. LDS 5811ST Stainless Steel...

3 Answers

Mod m.d.c.5100aww ser28126829ax I had a repairman come out. He said the "sprayers" are plugged. I'm on a fixed income. With my bills I can't afford to get it fixed. Trying to fix it myself. I...


Most dishwashers dispense the detergent via gravity and the sprayer arms spraying against the soap dispenser once the little door flips open during the wash cycle. Since it sounds like the soap door is opening I would look at the sprayer arms and make sure they are free of food particles or other debris that might be keeping them from rotating and spraying properly. Here are some instructions for performing this check.

Remove the lower dishrack from the unit. Reach into your dishwasher and spin the lower spray arm. Take note of whether or not the arm moves freely or if its movement is restricted. It should not be restricted in its path of motion. Now gently pull up on an end of the spray arm. The spray arm should be free to wobble up and down. Unscrew the arm retaining knob (some of these are left hand threads) and take the arm out for inspection and carefully examine the spray arm seams. If they have split or are damaged, the dishes may not receive the amount of water pressure required to fully clean the dishes or to rotate the arm properly. What’s more, if water is in fact spraying out of the spray arm from its seams, it is possible that it can cause your dishwasher to leak. Make sure there is no debris in any of the holes.

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If your dishwasher has a spray tower, pull up on it as far as it will go and then let it fall back down. Again, this movement should not be restricted. It should be a fluid and smooth motion. Also, unscrew the spray tower and examine it for any debris or foreign objects. Remove any that you find.
Gain access to the upper spray arm by removing the upper dishrack. Perform the same tests for the upper spray arm as you just did for the lower spray arm. Keep in mind that the upper spray arm may not wobble as much as the lower spray arm.
On a final note, some dishwasher models have a water tube that meets up with the upper spray arm once the upper dishrack is pushed back. It is a good idea to check to make sure this tube is aligning properly with the upper spray arm and that this has not split or is damaged in any other way.

Mar 24, 2008 | Dishwashers

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