Question about Thermador Dishwashers

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Water coming in dishwasher hours after wash cycle completed.

In between use, 1-2" water backfills the bottom pan of the dishwasher, sometimes even enough to spill out ouer the front edge when the door is opened. The water is not from dirty dishes draining. After the wash cycle completes, there is no water in the bottom. Why is water coming back in?

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  • rombult May 27, 2010

    I have no other appliances hooked up to the drain. Is there some sort of switch accessible from inside the diswasher that I can check, that keeps water from coming back through the drain into the dishwasher?

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  • Thermador Master
  • 2,605 Answers

Hello, Welcome to Fixya ! You've come to the right place. The problem you're experiencing sounds like (unfortunately) a common one. The water inlet valve has been an issue with B/S/H built ( this includes bosch, thermador, seimens & gaggenau ) dishwasher's going back to the mid 90's. Unfortunately I've seen some pretty serious damage over the years in extreme cases when left unchecked for several days...or longer. You may want to call in a pro however, the part to repair it is available at most brick & mortar appliance part centers or you can check out on-line vendors such as repairclinic.com, apwagner.com etc. Do a search for part # 1105846 at repairclinic ( that is their part # not B/SH/ ) you'll see what I'm talikng about. By the way it's about $35. Hope that helps move you forward. Let me know if I can assist you further, or need help on how to change it etc. It's relatively easy with Bosch, just turn off the power, the water, access is gained through the kick plate/toe panel below the door. The valve will be on the left and involves only removing 2 screws, the water line in & out and 2 wires which go on either way...they aren't polarity specific. Thanks for coming to "fixya" for your inquiries and please take a second to rate this answer according to my helpfulness. Good luck. Macmarkus :)

Posted on May 27, 2010

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  • Master
  • 909 Answers

If it drains, it means pump is ok. Possible cause is" do you share a drainage area with another appliance ie washing machine? Try running it alone if so. Another possible cause is the pressure switch could be restricted and the connecting pipe onto the pressure pipe needs to be pulled off and blown into.Once cleared retry.

Posted on May 27, 2010

  • Terence Fourie
    Terence Fourie May 27, 2010

    Never knew the full complaint untill second part. If water is still finding its way into machine much later, it will almost certainly be the water inlet valve that is problematic and is not totally sealing off completely. Quickest way to check. is when finnished using machine, turn the water supply off and see if water stops entering the washer. If so, your valve needs to be replaced.

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