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

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LG LDS5811WW Low pressure out of spray arms

Dishes are not getting clean. Low water pressure coming out of spray arms. Arms do not rotate. Water spray out of lower arm holes is about 4 to 5 inches high with no rotation. Screens clean. Nothing in impeller. All arm holes clear. Water pump turns by hand. Water drips from nut that holds upper arm in place. No water spray from upper arm. Upper arm does not rotate. Noise that sounds like something draging on impeller for a few seconds, then goes away. Happens three or four times at start of each wash cycle. Sound like something starts to rotate, then stops. Whats wrong? Thanks for your time and help!
John

Posted by jaciancio on

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2 Answers

Jeff Meyer

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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!

Posted on May 14, 2009

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Bobby

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I would start with watching the operations of the dishwasher if you can before trying my fix. start with a few sandwich bags and flashlights. I had a small video camera to record the operations of the dishwater so I know whats wrong. My upper arm didn't spin as it had little water coming out causing my dishes to be dirty.
This is a easy fix for any dishwasher with this problem. Remove all the screws on the lower pump assembly. underneath you will see two white wheels. The taller white wheel is what changes the water flow. I believe it only turns one direction so rotate this until the closed part is against the wall thus opening both ports. This wheel is what controls the water flow for both lower and upper sprayers. Reassemble the cover carefully with the gasket in place.
This job is really easy to do so just take your time.
Moving forward I wouldnt use the half load option on your dishwasher as this might cause this problem again.
Hope this helps fix your dishwasher.

Posted on Oct 11, 2011

  • mtagauto
    mtagauto Jul 10, 2012

    Same problem with mine, just had very low flow. Did as above, removed tray, removed strainers, pulled upper grey plastic pipe out that sends water to the top level. Removed the 4 screws on the plastic cover at the base of the machine. Found a little white cover and removed the screws there. Inside I found a cup style thing that looked like it was actualy blocking the centre inlet pipe. Spun it 180 degrees, put it all back together and hey, I don't need to do the dishes anymore.

    Thanks heaps.

  • Kate Vitale
    Kate Vitale Feb 12, 2018

    Rotating the white wheel fixed our problem too! Thank you so much for posting the solution! Too bad we replaced a bunch of parts in the process, including the motor ;)

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1 Answer

Why doesn't upper sray arm work?


  • Improper loading or over loading of dishes and glass ware that blocks the spray arm from rotating; check your user's guide for proper loading methods.
  • the holes in the spray arm can be plugged from food particles or other debris, like coffee grounds; remove the spray arm and clean out the holes; run water through the arm to verify there is no blockage.
  • check to see if the spray arm became disconnected from the feed tube or the feed tube from the water inlet feed hose.; reconnect hose or tighten down on hose clamps
  • check for any filter blockages; remove food particles and debris
  • the tub itself could be under filling, because of a restricted water inlet valve; pour 1 to 2 quarts of water into the tub of the dishwasher and run it; if the performance improves, replace the water inlet valve with a new one; DO NOT try to repair the old valve- it will fail once it's taken apart and put back together.
  • the circulating motor drives a water pump that rotates an impeller, which creates water pressure to go through the washer arms and out the holes. The jetting action of the water pressure exiting the spray arm holes propels the arm to spin...if the water pump impeller is worn, damaged, or impeded by food debris, the cleaning action will be greatly diminished; inspect and clean or replace the impeller if necessary.
  • If the aforementioned trouble shoot and repair methods do not correct the problem, then a more in depth diagnostic check will have to be done by a qualified repair technician to check switches that controls the water/drain pump, (if it is a dual action model for example); to verify if the switch or the pump itself has failed.

Mar 24, 2015 | Dishwashers

4 Answers

Dirty dishes


It could be a motor or a pump issue. The dishwasher has a motor that attached to a pump which forces the water up into the sprayer arms and during the drain cycle, it pushes the water out of the dishwasher.
The motor (and pump) located beneath the dishwasher.
Check if motor spins. In case it spins, the problem is with the pump ,in case it doesn't spin it could be a motor problem or a motor and pump problem.

First of all: filter plate clean? Clean any locked hole.
1) Can you remove the upper spray-arm and verify if holes inside are locked by any residus. Clean the holes , and check if pure water come out when you fill the center hole with some water.
2) Switch on the dishwasher , coldest wash cycle dish-washer empty and without the upper spraying arm. Once you hear water streaming in, open the door and look if a little water fountain comes out from the center hole where the upper spraying arm was fixed. If not, this canalisation is blocked and should be cleaned. Try to continue the wash cycle, often the water pressure will clean itself this canal. Check also lower spray arm: it should be rotating a while and ejecting water thru its holes. If not, verify this canalisation as well.

3) Put the spraying arm again on its place, verify also the sealing else water pressure is going down and spraying will not turn and spray water.

4) Again, continu a wash cycle, open the door and look; upper arm should be rotating and some rays trown out.

Hopefully, this helps .

If not, pump pressure may be low; have a repair verify, can be that only brushes in the motor must be replaced, can be the pump worn out and to be replaced at all.

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1 Answer

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Probably blocked spray arms is the cause of the unit not cleaning properly or rotating. Remove each spray arm (there are 3 in total) and check and clean all the holes as this is where the water sprays out from to clean the dishes and glasses. When they are blocked you get poor wash results.

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I removed the lower spray arm, and then the filter. I found that there was a lot of buildup under the filter area. I scraped the buildup off. I found that it was restricting the input of water flow to the pump

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

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there is insuffient water in appliance it needs 32 litres to wash properly and have enough pressure for wash pump to drive spray arms round this is quite easy to fix but messy, remove base panel plastic and metal one behind this exposing a plastic corrugated hose this will be blocked with fat limescale etc and needs cleaning it is a push fit with o rings pull out clean pipe refit and all should be well.also check holes on ends of spray arms are not blocked as they will not rotate but water will still come out

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Recommend you pull the bottom spray arm straight up, then out of the DW.
Remove 9 phillips screws that hold the filter shroud down. Remove the filter and clean/rinse it out.
While the filter it out, grab a flashlight and inspect all over the sump area. Especilly in the area the has the check valve that rotates (Vario motor-driven) to feed the water pressure either to the lower and then the upper arms. Watch out for broken glass! Also, inspect the impeller to see if it is undamaged and spins easily.
Reassemble, then test out.
If problems remain, the the wash pump motor is probably the culprit. Do you get any error messages on the time display?
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My Bosch dishwasher model #SHU43C05UC/14 drains well and has enough water(I replaced the inlet water valve already),but not washing the dishes clean especially the top rack.What could be wrong?


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