LG Dishwasher water flow is weak coming out of the lower spray arm. No water coming out of the upper spray arm. I changed the water inlet valve, and there isn't any difference.

follow this steps and fix it. God bless you

Water Inlet Valve

If the dishwasher is leaking water the water inlet valve might be defective. If the water inlet valve sticks open, it will allow water to fill the dishwasher continuously. Some customers report that they see clean water filling the bottom of the dishwasher after it's been sitting all night or for a couple of days. If this happens, turn off the water that is supplying the dishwasher. This is normally a valve under the kitchen sink. Then, replace the water inlet valve, it cannot be repaired. The water valve needs at least 20 lbs pressure to shut off properly. If your water pressure is to low replacing the valve may not solve the problem.

Center Wash Arm Assembly

If the dishwasher is leaking water, the center wash arm assembly might be cracked or split. This can allow a jet of water to spray toward the door seal, causing a leak. If a crack or split in the center wash arm assembly is found, replace it. There isn't any glue that will hold the part together inside the dishwasher.

Lower Wash Arm Assembly

If the dishwasher is leaking water the lower wash arm assembly might be defective. If the lower wash arm has a crack or split on the end, it can force water to spray directly toward the lower part of the dishwasher door. Then, the water can be forced under the door and onto the floor. Check the lower wash arm for any cracks or splits and replace it if necessary. Also make sure the screws are tight in the wash arm support. If the screws are loose, water can spray out the side of the pump and cause a leak.

Upper Wash Arm Assembly

If the upper wash arm assembly is broken or cracked it can cause water to spray very forcefully toward the seams of the door, causing a leak.

Door Seal

Every dishwasher door has a door seal. If the dishwasher is leaking water, it might be that the door seal is defective or worn out. Try closing the dishwasher door on a dollar bill and see if the door seal is making good contact all the way around the door. If not, replace the door seal. If the door seal is good or has been replaced and there is still a leak check the door hinges. If the hinges are bent the door will not close properly and the hinges will need to be replaced.

Dishwasher Door Gasket

Every dishwasher door has a door seal. If the dishwasher is leaking water, it might be that the door seal is defective or worn out. Try closing the dishwasher door on a dollar bill and see if the door seal is making good contact all the way around the door. If not, replace the door seal.

Water Inlet Valve

If the dishwasher is leaking water the water inlet valve might be defective. If the water inlet valve sticks open, it will allow water to fill the dishwasher continuously. Some customers report that they see clean water filling the bottom of the dishwasher after it's been sitting all night or for a couple of days. If this happens, turn off the water that is supplying the dishwasher. This is normally a valve under the kitchen sink. Then, replace the water inlet valve, it cannot be repaired. The water valve needs at least 20 lbs pressure to shut off properly. If your water pressure is to low replacing the valve may not solve the problem.


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Center Wash Arm Assembly

If the dishwasher is leaking water, the center wash arm assembly might be cracked or split. This can allow a jet of water to spray toward the door seal, causing a leak. If a crack or split in the center wash arm assembly is found, replace it. There isn't any glue that will hold the part together inside the dishwasher.


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Lower Wash Arm Assembly

If the dishwasher is leaking water the lower wash arm assembly might be defective. If the lower wash arm has a crack or split on the end, it can force water to spray directly toward the lower part of the dishwasher door. Then, the water can be forced under the door and onto the floor. Check the lower wash arm for any cracks or splits and replace it if necessary. Also make sure the screws are tight in the wash arm support. If the screws are loose, water can spray out the side of the pump and cause a leak.


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Upper Wash Arm Assembly

If the upper wash arm assembly is broken or cracked it can cause water to spray very forcefully toward the seams of the door, causing a leak.


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Help me find my model number

Door Seal

Every dishwasher door has a door seal. If the dishwasher is leaking water, it might be that the door seal is defective or worn out. Try closing the dishwasher door on a dollar bill and see if the door seal is making good contact all the way around the door. If not, replace the door seal. If the door seal is good or has been replaced and there is still a leak check the door hinges. If the hinges are bent the door will not close properly and the hinges will need to be replaced.


Enter your model number to see parts for your dishwasher.
Help me find my model number

Dishwasher Door Gasket

Every dishwasher door has a door seal. If the dishwasher is leaking water, it might be that the door seal is defective or worn out. Try closing the dishwasher door on a dollar bill and see if the door seal is making good contact all the way around the door. If not, replace the door seal.

God bless you

The problem is hard water. There is a new product out called the dishwasher filtration system. It filters the water before it enters your dishwasher. It works amazing and has a money back guarantee. You will love the way your dishes look after the first load. It is also very affordable (like 70 bucks). Go to www.dishwasherfilter.com to find out more info.

It could be that your dishwasher is not getting enough water. Let the water fill the dishwasher, set the spray arms in the same direction. Add a large pot of hot water and run the dishwasher. Open the door and check to see if the spray arms have moved. If they have moved, replace the water inlet valve.
Remove the 4 screws holding the lower kick panel. Remove kick panel. Locate the water inlet valve. This is the electrical valve where the water pipe hooks into the dishwasher. Shut off the water to the Dishwasher and electrical to the dishwasher. Disconect the 2 wire plug at the water inlet valve. Disconect the water supply to the dishwasher at the valve and disconect the rubber hose attached to the valve. Install new valve and test machine.
I hope this helps.

I would check to see if you have enough water in the dishwasher. Let the dishwasher fill with water and set the spray arm in a positoin you will remember where it is.
Take a large pot of hot water and add it to the dishwasher and close the door. Start the dishwasher and observe to see if the spray arm moves.
If it moves you may have to change the water inlet valve. It may be restristing the water flow into the dishwasher.
The water inlet valve is located behind the lower kick panel.(4) screws, Remove the panel and see where the water pipe hooks into the water inlet valve. Remove two wires and two screws. Shut water off and remove the water line going into the valve and the small rubber hose coming out of the valve.
Replace valve and reinstall kick panel.
Hope this helps.

Hello there:
There are 6 areas that could cause this to happen Please follow these simple steps ok
Investigate each of these six areas if your dishwasher is not completely cleaning your dishes:

Water Inlet Valve

A dishwasher's water inlet valve is its most common part to fail. When your dishes are not being fully cleaned, quite often a faulty water inlet valve is to blame. Test your dishwasher's water inlet valve, and if it is no longer functioning as it should, you will have to replace it.

• How to test a dishwasher water inlet valve.
• How to replace a dishwasher water inlet valve.



• Find a dishwasher water inlet valve.

Upper or Lower Spray Arm

Your dishwasher has a lower spray arm. It may also have an upper spray arm at the top of the dishwasher. These spray arms are designed to shoot high pressure, high temperature water at your dishes. It is possible that the holes of the spray arms, where the water comes out, are blocked with debris, affecting wash quality. You should inspect your dishwasher's spray arms regularly. Clean out the spray arms as need be.

• How to check a dishwasher spray arm.
• How to remove and replace a dishwasher spray arm.



• Find a dishwasher spray arm.

Heating Element

Water temperature is a key element in achieving clean dishes. A dishwasher's heating element is not designed to heat the water that enters it. Rather, the heating element is designed to maintain the heat of the water that enters the dishwasher. Its a good idea to run the hot water in your sink for a couple of minutes before you run the dishwasher. Just to make sure the water is nice and hot before it enters the dishwasher. If the water is unable to stay hot, it can adversely affect your dishwasher's cleaning ability.

• How to test a dishwasher's heating element.
• How to replace a dishwasher's heating element.



• Find a heating element for your dishwasher.

Filter/Drain Grate

There is a filter in your dishwasher. Its function is to keep large particles of food and foreign objects away from the pump. Many of the newly-manufactured dishwashers have self-cleaning filters, and routine cleaning isn't a concern. However, some other dishw ashers need to have the filter removed and cleaned regularly. If the filter or grate is clogged or blocked with debris, it may interfere with the normal functioning of your dishwasher. Consult your owner's manual for specific directions for removing your dishwasher's filter and cleaning it.

• Find a filter for your dishwasher.

Detergent or Detergent Cup

It could just be that you aren't using enough soap to completely wash your dishes. Your dishwasher may be designed to dispense soap at two different times during the wash cycle. If you don't fill all of the detergent cups, then the diswasher will lose a cleaning cycle. Also, if you use a gel-type detergent, try switching to a powered kind. Powders tend to dissolve better in hot water. And don't buy in bulk. Detergents are most effective in the first two weeks. After that, they decrease in potency.
Alternatively, your dishwasher's detergent cup could be defective in some way. It is possible that it is gunked up full of built up detergent, and a thorough cleaning may be enough to get it working again. If that doesn't do the trick, you probably need to replace the entire detergent cup assembly. If your cup isn't even opening, please see our section My dishwasher detergent cup won't open.

• Find detergent dispenser parts for your dishwasher.

Cycle Selector Switch

Sometimes a dishwasher's cycle selector switch is the reason why dishes are not coming completely clean. Test your selector switch to determine whether or not it has become defective. If it has, replace it.

• How to test a dishwasher cycle selector switch.
• How to replace a dishwasher selector switch.

Took apart again and found the stepping motor which diverts the water from lower to upper spray arms to be burnt out. I was able to manually set the diverter to the correct position so the dishwasher works but I am waiting for new parts to properly repair the problem.

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!

Water Inlet Valve

A dishwasher's water inlet valve is its most common part to fail. When your dishes are not being fully cleaned, quite often a faulty water inlet valve is to blame. Test your dishwasher's water inlet valve, and if it is no longer functioning as it should, you will have to replace it.

• test a dishwasher water inlet valve.
• replace a dishwasher water inlet valve.
  
  
• dishwasher water inlet valve.
• 
• Upper or Lower Spray Arm
  Your dishwasher has a lower spray arm. It may also have an upper spray arm at the top of the dishwasher. These spray arms are designed to shoot high pressure, high temperature water at your dishes. It is possible that the holes of the spray arms, where the water comes out, are blocked with debris, affecting wash quality. You should inspect your dishwasher's spray arms regularly. Clean out the spray arms as need be.
  
  • check a dishwasher spray arm.
  • remove and replace a dishwasher spray arm.
    
    dishwasher spray arm.
  • 

Heating Element

Water temperature is a key element in achieving clean dishes. A dishwasher's heating element is not designed to heat the water that enters it. Rather, the heating element is designed to maintain the heat of the water that enters the dishwasher. Its a good idea to run the hot water in your sink for a couple of minutes before you run the dishwasher. Just to make sure the water is nice and hot before it enters the dishwasher. If the water is unable to stay hot, it can adversely affect your dishwasher's cleaning ability.

• test a dishwasher's heating element.
• replace a dishwasher's heating element.
  
  
• Find a heating element for your dishwasher.

Filter/Drain Grate

There is a filter in your dishwasher. Its function is to keep large particles of food and foreign objects away from the pump. Many of the newly-manufactured dishwashers have self-cleaning filters, and routine cleaning isn't a concern. However, some other dishw ashers need to have the filter removed and cleaned regularly. If the filter or grate is clogged or blocked with debris, it may interfere with the normal functioning of your dishwasher. Consult your owner's manual for specific directions for removing your dishwasher's filter and cleaning it.

• filter
• 
• . Detergent or Detergent Cup
  
  It could just be that you aren't using enough soap to completely wash your dishes. Your dishwasher may be designed to dispense soap at two different times during the wash cycle. If you don't fill all of the detergent cups, then the diswasher will lose a cleaning cycle. Also, if you use a gel-type detergent, try switching to a powered kind. Powders tend to dissolve better in hot water. And don't buy in bulk. Detergents are most effective in the first two weeks. After that, they decrease in potency.
  Alternatively, your dishwasher's detergent cup could be defective in some way. It is possible that it is gunked up full of built up detergent, and a thorough cleaning may be enough to get it working again. If that doesn't do the trick, you probably need to replace the entire detergent cup assembly. If your cup isn't even opening, My dishwasher detergent cup won't open.
  
  
  

Cycle Selector Switch
Sometimes a dishwasher's cycle selector switch is the reason why dishes are not coming completely clean. Test your selector switch to determine whether or not it has become defective. If it has, replace it.

• test a dishwasher cycle selector switch.
• replace a dishwasher selector switch. if bad