Bosch Dishwasher help

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by TimTaylor, Aug 20, 2020.

  1. TimTaylor

    TimTaylor New Member

    Aug 20, 2020

    I have a Bosh dishwasher (SHEM78W55N/10) with the following problem: Not enough water is flowing into the dishwasher, and there is not enough pressure in the spray arms to make them spin.
    The problem is slowly getting worse. At first, only the top spray arm would not spin.
    Now, neither spray arm spins.
    Manually adding half a gallon of water to the dishwasher is an effective work around, but it requires timing the cycle properly. Presumably, this indicates that the pump is working.

    -The water supply line is not kinked.
    -The symptoms remain whether or not the dishwasher is loaded.
    -The spray arms are not clogged.
    -The water inlet system is in good shape.
    -The water inlet valve was already replaced, but this had no effect on the symptoms.

    Any ideas what might be causing the problem?
  2. plumber69

    plumber69 In the Trades

    Jun 20, 2014
    Prince Rupert, British Columbia
    It's possible the valve supplying the dw is faulty. Or could be mostly closed. Hook a supply line up to it and fill a big bucket. Or try swapping the dw and faucet lines
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  4. Sylvan

    Sylvan Still learning

    Sep 23, 2004
    plumbing - fire suppression - boiler inspector
    New York
  5. Terry H

    Terry H In the Trades

    Aug 4, 2020
    I’m with dude above, the solenoid to the dishwasher
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