I've tried cleaning the arm - nothing in any of the spray holes. Taken off the back run of plastic that feeds the top spray arm - checked for obstructions. Checked the screen (replaced 3 weeks ago because dishwasher wasn't drying dishes). I've taken it all the way to the impeller and still can't find the problem. Also, added water after the initial drain on start-up thinking maybe there just wasn't enough water getting into the unit.
Can anyone suggest something I haven't done yet...besides throw it out into the yard?!
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Re: Top arm in dishwasher will NOT spin!
When you say the top arm does not spin, remember that the LG model x811 family has the Vario feature that alternates between routing the pumped water to the bottom arm and then the top arms alternately. So anytime the dishwasher is washing and rinsing, either the lower or upper arms will be spinning.
If the problem is not above, then the motor that drives the check valve may have failed (or the check valve is obstructed inside.)
Hope that helps. Please post back here with what you find, OK?
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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.
There are 2 spray arms for the top rack. A small one on the dishwasher top and a bigger one attached to the bottom of the upper rack. Both get water feed from a flat tube that runs up the back wall of the dishwasher. Not much to the very top little arm--just check the spray holes for any food blockage and try to clean with a brush or tooth pick. The bigger arm on the bottom of the top rack gets its water feed through a hole about half way up the flat tube on the back wall. When you push the rack all the way in, it has to plug itself into that hole in the back wall. Check that plug in area and make sure nothing broke off that would keep it from making a good seal with the rack all the way in. All check all the holes in the spray arm for food blockages. On the very end of all spray arms is a main hole that is the drive hole to spin the spray arm. The water shoots out that hole and acts like a jet engine to push the arm around. Make sure those holes are clear.
Please check if something is blocked near the top spray arm, also make sure that all holes are open. 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 you'll need a Torx screwdriver 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.
Have you checked the seal/gasket on back of the upper spray arm assembly?
If you pull the upper basket forward the entire spray arm assemble will come with it. You can remove the spray arm assembly by releasing the single clip at the top at the rear of the basket. The spray arm assembly with then slide out backwards.
Once you've removed it, have a look at the back of it. There is a plastic gasket inside with 2 holes which fit over the studs at the top of the delivery tube still attached to the back of the dishwasher.
You can remove the back cover of the spray arm assembly by releasing the 2 clips at the top and bottom. Be careful here as they may be brittle after prolonged use of the washer.
Remove the back cover and take the plastic gasket out. Place the holes of the plastic gasket over the studs on the delivery arm in the back of the washer and check the gap between the gasket holes and the studs and check for excess movement.
If there is a significant gap or movement here, then it needs to be replaced. If there isn't a reasonable seal at this location, water will leak from there and there may not be enough pressure to rotate the spray arm
If you've already done this or there seems to be no problem with the gasket, please let me know and I will try to assist you further. Similarly, if this proves to be the problem and you need assistance obtaining replacement part/s, just let me know.
Cleaning the filter was the right thing to try.
Since you don't see cracks/breaks on the spray arm and it appears that it is spinning freely, I doubt that replacing the spray arm will fix your problem.
If your dishwasher is several years old, your problem is likely a failing pump motor, but before you swap that out, check that the impeller is not damaged. Good Luck!
There is a screen that you can remove from the sump of the dishwasher to clean. Just twist it to the left and pull it out. I have some tips that you might want to check out if this does not resolve your problem. <a href="http://tclaundryrepair.com/">St Paul Appliance Repair</a>
Give the spray arm a spin to make sure it rotates. It should spin freely. If not, remove plastic spray arm clip, flip it over, replace it, and try again. Make sure holes in the spray arm are clear of debris. Spray arm must be clean for it to spin. If spray arm does spin freely, remove spray arm clip, spray arm and the post assy (the thing the spray arm attaches to). Try your WikiFix again. This time add baking soda to the hole the post assy came from. Top it off with white vinegar. Leave it overnight. In the morning, stick your finger down the hole where the spray arm assy sat. You should feel a plastic thing. This is a propeller attached to the recirculation pump. You need to free it up. Get that thing moving with your pinky or a chopstick or whatever. Try the machine without the spray arm. You should get water blasting up from the hole. Reassemble the spray arm.
only the top rack isnt getting clean? there is a little plastic
circle in the middle of the bottom of the upper spray arm. turn it
counter clock wise to pull the upper spray arm from the upper rack.
make sure that isnt clogged and the spray holes are not clogged.
the piece that the bottem spray arm plugs into and
runs along the back wall of the tank to the top is called a feed tube.
pull the bottom spray arm out. now you can see the part of the feed
tube that feeds the upper spray arm water. does it pop out freely and
easily? if so then you need a new feed tube, if not then its most
likely your not achieving the right water level or your impeller
connected to your circulation pump(motor) is clogged not supplying
enough water pressure to travel up the feed tube to spin the upper