LG LDF6920ST Bottom spray arm dose not work

Remove the upper wash arm from the rack. Examine thoroughly. Look for hair line cracks especially if the wash arm is plastic. Top rack wash arms have spray holes on the top AND bottom. Check both places. Sometimes small fish bones will clog the hallway of wash arm not just the holes. After years of use, the wash arm will bow especially plastic ones. Be sure the water connection to wash arm is Secure. If you think the wash arm is not spinning, try this. Place a old cell phone inside a sealed glass jar and start recording video from the lower rack. Be sure jar is Secure. The light from phone will come on. You might see the problem this way.

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list given is the wrong stuff to clean any dishwasher
LG LDF6920ST Dishwasher
thats an old dishwasher now
use recommended dish washer cleaners regularly
off the shelf deodoriser and sanitizes on an full empty cycle

check the filter at the bottom is kept clean each load clean
temp of wash water may no be enough
helps if you wash off any food stuffs on articals with hot water before placing in the dishwasher

make sure the lower spray arm is free from objects in the ports and spins freely. If you still have a problem LG is offering some customers an pump upgrade free of charge depending on the age of you dishwasher

Hi, I have an older dishwasher also and recently mywife also complained about it not cleaning right... so me being the man I amtried in vain to clean the things... Bought new spray arms online and installedthem in minutes...now the thing works like new... However I have also foundthat if the heating element goes bad then that also can mess things up bad...So I would buy new spray arms, and also check out the heating element to makesure it is working... Here is a tip that will help you with the onlinebuying...
Dishwasher SprayArms not Spinning

How to Buy ApplianceParts Online

A bad heating element causes many problems in dishwashers...

Dishwasher Problems The HeatingElement not Working

DishwasherMaintenance DishwasherResidue and Film on Dishes

heatman101

Asker's Testimonial "explanation very clear. will give it a go and see howsimple it was. thanks Ronnie " - ronnieshomes

This sounds like your motor is not circulating properly, this will cause the spray arms not to operate properly, or at all. Are you receiving any kind of error code on the display? Also, how far is the dishwasher filling up?

http://www.lg.com/common/product/support.jsp?localeCd=US&productId=LDF6920ST&uri=/us/appliances/dishwashers/LG-LDF6920ST.jsp&categoryIdCms=4#

Hi

Please check if something is blocked near the top spray arm, also make sure that all holes are oopen. Use a sharp metal pin to clean the holes on the top spray arm. Make sure the water pressure is not low.

under the screen and youl'll need a Torx driver to get to it after you remove the spray arm and screen. Check to see that the path it travels is clear. I have seen these get blocked up by stuff.

Now check if the top arm spins freely and check the bearings for the arm, if they are producing extra friction while the spray arm spins. Hope this helps... Please post back if you need more assistance.

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.

Blockage in the feedpipe or pump not working.