Dishwasher fill valve / appliance people?

B1Toad

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Any appliance people here? Or more specifically solenoid valve experience? The patient is a KitchenAid dishwasher about 3 years old. This morning we woke up to water on the kitchen floor. There was a small trickle coming out of the fill port on the side and it filled the tub and over flowed. I shut off the supply, unplugged the DW and removed the solenoid valve but it seemed to be tightly closed as I could not blow air thru it and it would hold suction from the outlet end. So I took it out to the garage and connected it to a high pressure hose bib and rigged up a test wire.

I cycled it more than 50 times, each time it shut off completely. Next I re-installed it on the DW and turned on the water, plugged it in and there was no more water dribbling out of the fill port.

I can only surmise that the valve somehow got cocked in it's bore and didn't fully close that one time. It's hard to believe there was debris in it due to a very fine inlet screen on the solenoid valve. Not sure if I should replace the valve or if it was something else causing it to open slightly.

I'm going to try running it for a few days and watching to make sure it shuts completely off every time. Here's why: The one thing I should have done before removing it was to unplug the DW with the water supply still on to see if it was somehow getting enough power to let it leak. I am doubtful of that theory though as it is not a variable valve, it just slams full open when energized and full closed when de-energized. But without that test I can't rule out everything else.

Any ideas appreciated.

DW valve.jpg
 
Do you have hard water or calcium build up? I agree with Zorba.

We do have hard water and calcium. It probably was a case of the valve hanging up. I'm going to flush the tankless water heater, then flush all the water lines just to get all the crap out before installing a new valve. Meanwhile will run with the old valve on the slight chance it is something else which if it is I'd want to know.
 
The vitron rubber valve seal is probably nearing the end of its useful life. Replace it before it totally fails and you flood your house.
 
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