Upper spray arm - Miele 24 in. G865 Built-in Dishwasher

To be ale to remove the upper spray arm on the dishwasher pull the upper rack forwards and then turn the nut located above the spray arm and under the rack in a counterclockwise turn and then pull down. The spray arm will become loose to be able to detach and remove . To take out the top spray arm start first by removing the cutlery rack.

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.



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.

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.

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.

Which one the upper or the lower spray arm? If the lower is spraying and the upper isn't.. Check the spout pipe to the upper sprayer arm, it is pluged. Or the sprayer arm is wore out around the fitting. GB...stewbison

First,

See this link for a picture of the upper spray arm and manifold assembly.

http://www.apwagner.com/index.php?main_page=model_lookup&model_num=KUDP02IRBL0&model_id=163723&diagram_id=380403

Referring to parts 1, 6, and 9, make sure everything is attached, secure, and lines up when the upper rack is pushed back into place.

It's possible the pump is obstructed and not delivering water to the upper arm, but the more likely cause is a displaced upper arm feeder tube. If no luck, start checking for obstructions in the feeder tube, manifold and the spray arm.

plugged spray arm holes, pump intake partially blocked, too little water getting in tub cuz screen in fill valve has debri

Possible causes of spray arm inefficiency:
Loading large or tall items in the lower basket which stops the arm revolving.
Upper spray arm split along seam.
Upper spray arm blocked.
Under dosing of powder causing foam and reducing upper spray arm water pressure.
Blocked strainers reducing water to circulating pump, therefore reducing upper spray arm water pressure.
inefficient wash motor impellor (faulty)

you most likely have gunk inside the arm or holes not allowing the water to spray out and turn the arm. Otherwise, the arm bearing may be stuck and will need a gentle push to loosen up.

No I don't believe its the pump. I believe the lower spray arm is possibly split open on the side causing a loss of presure and flow to the upper arm and overloading the door seal. As well the loss of flow to the upper arm will resulted in it turning too slow.