Question about Bosch 24 in. SHU5305UC Built-in Dishwasher

1 Answer

Contunuous draining turned into a flood when unit powered off

I have a bosch SHU5305 dishwasher. It seems to run continuously on drain and never starts a cycle (it does not get by the drain it seems to start a cycle with). I tried a few things -- resetting it and such but eventually decided to turn the breaker off for a while. When I reset it, it seemed to work -- it was filling but it seemed to continue to fill AND drain. Never did much else, just kept filling at the same time it was draining. I turned the breaker off again and left it. After a while, there was a flood in my kitchen. Shut the water off to the unit, powered up the breaker and forced a drain. Now I am wondering... when I powered it off while filling, did that leave the fill valve open causing the flood? If so, then that's not a problem, just my being naive. To the continuous drain issue, what could that be?

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  • 3 more comments 
  • stephen_gord May 09, 2009

    Can I get to the switch through the kick or do I have to pull the whole dishwaher? I can see water underneath and droplets around but can't see or "feel" a styrofoam float or the switch it activates???

  • stephen_gord May 09, 2009

    I think I found it, i removed the two screws holding the fill valve and moved it and feel a float in a pool of standing water...trying to get that out.



    Question...how did the water get there?

  • stephen_gord May 09, 2009

    Removed the water with shop vac. Float and switch seemed okay. Turned breaker on...machine drained and started to fill. noticed small droplets dripping from fill valve...after 30 seconds or so it started to "whine" and there was a fine mist coming out of the solenoid itself. That would explain where the water came from .... off to see if i can get a fill valve.



    Make sense?

  • stephen_gord May 09, 2009

    Success! I got a new fill valve (styled slightly differently than the original), hooked it up and am back in business!



    Looks like root cause was a leak from the fill valve (solenoid) that sprayed water in the underside of the unit causing the float to engage and a continuous drain.



    All good now... part $40 CAD

  • stephen_gord May 10, 2009

    Thanks for the help -- definitely pointed me in the right area to investigate / watch.



    I think my chiropractor will be more expensive than the service all -- a lot of time on the floor in weird contortions! Seriously, thanks :-)!

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  • 423 Answers

The fill valve is governed by the float switch. I doubt that your fill valve (solenoid) has failed.

Focus on replacing the float switch and you should be all set.

Good Luck!

Posted on May 09, 2009

  • Jeff Meyer May 10, 2009

    Well Done!!! Finding the root cause is very satisfying, isn't it? And being back in business without an expensive service call is even better!

    I hate being wrong, but so be it. :-)
    I would have put money on the solinoid valve being good, only because the high percentage of float assembly failures, compared to inlet valves. But there you go!


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