Hi guys,

Recently my d/w has been giving me grief. Items in the top rack are coated with a white residue after washing.

I've cleaned out the sump area around the chopper and the little rubber valve, but it doesn't seem to make a difference. The chopper screen itself was pretty clean, although there was a fair amount of hard junk (shells, toothpicks) down in there.

I've put 5 bowls upright in the top rack and they're filled when the cycle's done, so that indicates that the top arm is working - at least partially.

This has been going on for over a week and the wife is getting quite frustrated, so I'm hoping to figure out how to fix this thing soon!

Thanks.

Thanks for the reply. I've used a bit of vinegar before and that has helped clean the existing deposits, but doesn't keep the new film from appearing.

Where's the flap you're referring to?

It doesn't appear like the top spray arm is spinning. It's in the same position every time I check as the start of the cycle. The bottom arm is definitely moving, and I believe the middle arm is.

The top arm not spraying would definitely explain my problem, but so far I can't see why it's not working. I cleaned it when I cleaned the sump and grinder.

We've only had this for about 3 years, so I would expect the motor to be in good shape.

After further examination, the upper flapper valve that was stuck open is the one where our upper tray manifold usually is, so I suspect that's not the problem after all.

I took apart the fill tube and cleaned it completely, although there wasn't anything blocking the flow that I could see. Water ran freely from the manifold intake (@ flapper valve) through the upper spray arm.

I verified after re-assembly that the upper spray arm isn't spinning, although the middle one is.

I'm at a loss. What else can it be?

Sorry for the hosed-up model number. It's actually KUDS30IVBL3.

Other than the ProScrub ball bearings, which are controlled by magnets under the tub, I don't know how at least the upper two arms couldn't be working at the same time.

I've tried toggling the ProScrub option - maybe the magnet solenoid is shot, although we've literally never used that feature.

There's enough pressure in the bottom arm to hit the top of the tub. When I open the door mid-cycle, the waters dripping from the "ceiling" of the tub.

We've been running it on the lower tray, but even that is getting a white film, although not as bad as the upper tray.

I'm completely flummoxed. Anyone have any ideas? I'm not thrilled about buying a new dishwasher, but the wife's had it with this thing and if I can't pull off a 11th-hour fix, we'll be buying a shiny new Bosch later today.