Question about Dishwashers

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When i turn my Viking dishwasher on the motor starts to run but no water comes out. It was humming along for several hours before i realized that nothing was really happening. I turned it of and then tried again but the same thing happened. It sound like a motor and/or pump working but no water enters the chamber. Thanks, Jonathan

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  • 3 more comments 
  • jskow Feb 22, 2009

    how do you check if the ventilators are clear? The drain is clean but other than that there doesn't seem to be anywhere else where something could be blocked? Thanks- Jonathan

  • jskow Feb 22, 2009

    I filled the bottom with water. It drained but it doesn't seem like it sprayed. i

  • jskow Feb 22, 2009

    I filled the bottom with water. It drained but it doesn't seem like it sprayed. i

  • jskow Feb 22, 2009

    This was a well thought out response. a bit technical for my comfort level but much better than "Turn it off and call a repair person". Thanks

  • Alex Keen May 11, 2010

    Hi there,

    This sounds like you have a air in the pipes, the best bet is to disconnect one of the pipes and blow through it untill water comes out like a stream, this what you will know there is no air left in this.

    Disconnect the pipe from the pump.

    Hope this helps

    Alex

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6 Answers

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It sounds like the Water Supply Solenoid is bad. I would change that and let all of us know what happens.
When i turn my Viking - e9f89d7.gif
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Posted on Feb 22, 2009

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There is a small filter at the pump, where the water enters. Shut off the water supply, remove the supply hose and clean the filter with a toothbrush or just by rinsing backwards. Hard water deposits clog the filters quite easily. Do not run the unit without the filter. It will damage the pump.

Posted on Feb 22, 2009

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Have a look to make sure something has not fallen into the pump assembly, sometimes a hard piece ( like a pit ) or small utensil can fall into the pump and make a grinding style of a noise.
This is often the fill valve. You can test the fill valve coil for continuity with a ohm meter, no needle movement = bad fill valve. You can also test the fill valve for 120 volts at the fill valve with a volt meter, power there and no fill = bad fill valve. No 120 volts there, you will have to trace power back to find the trouble maker. Test things like the float and float switch, wires and timer. Fill valves are very bad for working once or twice and then quitting, if your dishwasher fills the first and second fill cycles and then no more water through the rest of the cycle, replace the fill valve. You will need to remove the access panels to get at the fill valve. Dishwasher fill valves also have a screen built into the valve entrance, this can also get all clogged up and need to be cleaned.

Posted on Feb 22, 2009

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Check the water inlet valve for clogging

Posted on Feb 22, 2009

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  • Starnley Johnwells
    Starnley Johnwells Feb 22, 2009

    anotherway is to remove the water valve, leaving the electrials plugged up,
    turn on the unit and see if water comes out of the valve (use a cup or
    towels to catch any water, of course) and see if youll get water If you don't get water then the valve may be faulty

  • Starnley Johnwells
    Starnley Johnwells Feb 22, 2009

    also checked the float valve and see if it's not stuck up.

  • Starnley Johnwells
    Starnley Johnwells Feb 22, 2009

    Water Valve - The dishwasher uses a single solenoid water inlet valve to
    allow water to enter into the tub when it calls for water. If the
    valve has become clogged you will experience this symptom. Check to
    make sure you have water getting to the valve and that the supply from
    the house is not turned off. Check for any loose or bad connections to
    the water valve. When you start a cycle the valve should read 120
    Volts AC. If it's getting the voltage and not water is not getting in,
    replace the valve. If its not getting voltage you may either have a
    bad timer or the float is stuck

  • Starnley Johnwells
    Starnley Johnwells Feb 22, 2009


    dish washer valve
    The Float Switch - This is a safety built in so that your dishwasher doesn't overflow. As the water level inside the dishwasher rises, so does
    the float. When it reaches a certain point, it breaks the power
    getting to the water valve. It is possible to have excess soap or
    dishes or whatever the case, cause the float to be stuck in the up
    position. These are located in the front of the dishwasher on either
    the right side or left side, usually covered with a cap. The switch is
    directly underneath the float. You will have to remove the kick panel
    to access the switch. The switch is an open or closed switch. When
    the float is up, the switch is open and you have not power to the
    valve. When the float is down, the switch should be closed and power
    should be getting to the water valve.

    float switch


  • Starnley Johnwells
    Starnley Johnwells Feb 22, 2009




    • Unjam the motor if jammed

    • Unjam the pump if jammed

    • Test the motor

    • Test the motor start relay

    • Check the drive belt


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Either the fill switch(Float switch) is dirty and sticking,or bad
Or the water supply solenoid is bad.

You can test everything else by manually filling the bottom of the dishwasher with water and running it.(If it sprays and drains,Etc.. then all else works)

Posted on Feb 22, 2009

  • Randy Hough
    Randy Hough Feb 22, 2009

    Check the drain,It is more than likely clogged.

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  • 326 Answers

Either the ventilations are getting blocked so the pump should be checked is it fully cleaned and clear/or the motor windings are gone faulty so the motor is necessary to replace.do not keep it on till it get repaired to avoid further damage.

Posted on Feb 22, 2009

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1 Answer

Bosch she45mo6uc/52. came home today and is has a loud hum. looks like it never got water in. the dry soap is just laying inside.


The humming noise is either from the pump motor or the water inlet solenoid. One of them is stuck. Take the mopboard plate off the front of the dishwasher and look for the solenoid. It will be a cylinder with two wires attached stuck onto a box in the water line. Start the dishwasher and touch the solenoid with a finger (naturally not the electrical terminals). If you feel it vibrating in time with the hum but do not hear the water running in, the valve is stuck closed. In this case the solenoid may rapidly get hot; that's why you just touch it with a fingertip.

If water comes in and the big motor in the middle starts humming as soon as the fill is complete, then the pump is jammed or the motor bearings are frozen. You'll have to disassemble the pump (from inside the tub) to see what's going on. You should be able to freely rotate the pump impeller and the motor shaft by hand (this is inside the pump; don't confuse it with spray arm, which is spun by reaction from the water spraying out rather than a mechanical connection to the pump motor).

Another possibility is that the water fill level switch is hung up and signaling a complete water fill when the unit is still dry. If this is the case, when you start the dishwasher you may hear the water solenoid briefly, then the pump will start running immediately. Since it has no water, it will just spin at full motor speed. A quick test for this is to pour about a gallon of water into the dishwasher, then close the door and let it run. If it runs normally until it gets to the rinse cycle, then it's either the level switch or the solenoid valve. (Be sure it isn't a pump problem first or you'll have to get the water out while you can work on it!)

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