Question about Bosch 24 in. SHX46A02 / SHX46A06 Built-in Dishwasher

3 Answers

Bought a used Bosch dishwasher. It is all hooked up. I believe water is hooked up bu whe we tuen the washer on it just hums (very, very quietly) it acts as though it isn't getting any water. I have checked the water hose and it is not clogged , what next?

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  • 7 more comments 
  • Tim Neuenschwander
    Tim Neuenschwander Sep 27, 2010

    I have confirmed there is water to the machine. So how do I determine if the pump is jammed? or do you suggest something else?

  • Tim Neuenschwander
    Tim Neuenschwander Sep 28, 2010

    Ok, I have done each of these steps. I am now looking at a circular white plastic "hole" about 4-5 inches in diameter or so. In the bottom of that hole I can see a small blue "fan" to the left and an a one inch or so hole to the right. I can not remove anything else (I think)

    What is next?


  • Tim Neuenschwander
    Tim Neuenschwander Sep 28, 2010

    Got the drawings, are these drawings much different from my model. These are for a SHY56etc...... I have a SHK46A06UC??? I don't see how I can take the 26-3102 seal off of my model as you can in the SHY????? Or am I just not trying hard enough?

  • Tim Neuenschwander
    Tim Neuenschwander Sep 29, 2010

    how do I know if the water inlet valve is bad. I know the water line is not clog.

  • Tim Neuenschwander
    Tim Neuenschwander Sep 29, 2010

    Ok, I feel like i am missing something. so you think i need to get to the drain pump right? soooo.

    you say to take off the front face panel (of the door?) or are you talking about the rim around the inside of the door? not sure. if you are talking about any of the panels inside the washer it is one piece (at least it looks like one piece.) suggestions with more detail would be appreciated.


  • Tim Neuenschwander
    Tim Neuenschwander Sep 29, 2010

    so how do i tell if the inlet valve is bad?

  • Tim Neuenschwander
    Tim Neuenschwander Sep 30, 2010

    Ok, I tested the intake valve and it was bad(I think) So I bought a new one. before I installed it I injected water in the free end of the water inlet hose. Water did spray into the tub. So I thought I am home free. I reinstalled the new water inlet valve. Then I started the machine and heard the hum but also sorta of a "bubble sound" and then only the hum. Nothing else. I emptied the tub and tried restarting but nothing but a hum. I can not find a float in this unit.
    What next?

  • Tim Neuenschwander
    Tim Neuenschwander Oct 01, 2010

    Ok, I tried the ohmeter on the RX1 position and get "to infinity" reading. but when I try a the voltmeter on the wires I get nothing.. so?

  • Tim Neuenschwander
    Tim Neuenschwander Oct 07, 2010

    While these were helpful. I tried something not suggested before I got into digging any further. I filled the diswasher tub with water and started the machine. It took one cycle and the machine kicked into gear and not runs fine. So I no longer need help.


3 Answers

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  • Master
  • 11,896 Answers

Check that the water valves are opening and allowing water to flow. If the pump is not getting water or is jammed, it will make a humming noise as well

Posted on Sep 27, 2010

  • 6 more comments 
  • Nate Stansfield
    Nate Stansfield Sep 27, 2010

    Flip the breaker switch that leads to the Bosch dishwasher at the breaker box to the "off" position before attempting to access the water pump.

    Remove the screws on the kick plate at the bottom of the dishwasher with a screwdriver and set the kick plate and screws out of the way.

    Pull the dishwasher door open and take the lower dish rack out of the dishwasher.

    Remove the spray arm assembly by using a socket wrench to undo the bolt at the top of the assembly and take the unit out of the dishwasher.

    Locate the water pump and motor at the bottom of the dishwasher, giving you access to the pump.

  • Nate Stansfield
    Nate Stansfield Sep 28, 2010
  • Nate Stansfield
    Nate Stansfield Sep 28, 2010

    to the drain pump for extraction means taking off the front face panel
    and the 90 degree bent steel panel(unpainted) at the door hinge. It may
    also involve removing the left vertical side panel. (power
    disconnected)Then find the electrical terminals on the pump and with a
    pair of needlenose or hemostats, depress the keepers on the contacts and
    pull the slide terms off the spade contacts. The pump removes by
    depressing the white plastic keeper lock located at about 2:00 on the
    circumference of the pump housing where it inserts into the tank sump
    and turning the pump counter-clockwise 1/4 turn. Then with the dexterity
    of a small monkey, you can extract the pump from the tank/catchbasin
    prison. On the new pump, use silicone grease on the o-ring and reverse
    the procedure.

  • Nate Stansfield
    Nate Stansfield Sep 29, 2010

    You can put an ohmmeter on the RX! setting and place it on the connnectors of the inlet water valves after disconnecting the wires. See if you get a reading. With a voltmeter you can test the wires going to the valves to see if you get power to them.

  • Disconnect your dishwasher from its power source. To do this, you may need to unplug the dishwasher or flip a switch on your circuit breaker.

  • 2

    Remove the lower dishrack from the dishwasher.

  • 3

    Unscrew the bolt on top of the spray arm and then remove the
    spray arm. If there is no bolt, slowly wiggle the spray arm back and
    forth while pulling upward to remove it.

  • 4

    Remove the screen below the spray arm.

  • 5

    Unscrew the bolts that hold the pump housing in place. Then remove the pump housing itself.

  • 6

    Remove the bolt that holds the upper impeller in place. The
    remove the upper impeller and the layers beneath it. Remove the food
    disposal blade, spacer plate, impeller hood, flat plate, O-ring, lower
    impeller and any washers.

  • 7

    Inspect pieces of the pump. Any pieces not worn can be reused in your new pump. Discard any worn pieces.

  • 8

    Reverse Steps 1 through Step 6 to insert a new pump into your dishwasher. Make sure to rescrew the bolts tightly.

  • Nate Stansfield
    Nate Stansfield Sep 29, 2010

    Actually don't forget to check the float in the unit under the bottom rack. The float is a piece
    that should easily move up and down, and it's generally located in a
    corner. It might look like a round plastic disc beneath a post. If the
    float doesn't move up and down freely, more than likely it's stuck, and
    this very well could be the source of the problem when the dishwasher
    won't fill.

  • Nate Stansfield
    Nate Stansfield Sep 29, 2010

    For the valves: Disconnect supply line, open supply valve and see if there is plenty of water.

    Remove water inlet valve. Disassemble and clean the water inlet valve. Apply 120VAC to relay coil: valve should operates. If not, it's bad

    Use turkey baster to inject water into free end of water inlet hose. Water should spray into tub.

    Reinstall water inlet valve. Open supply valve. Apply external 120 VAC to water inlet valve relay. Water should flow into tub.

    Measure voltage at water inlet valve relay feed wires. Should be 120 VAC.

  • Nate Stansfield
    Nate Stansfield Oct 01, 2010

    The water inlet valves are what connect the external and internal hoses and it opens to draw in water and closes to stop the water flow. These valves can be tested with an ohmmeter on the RX1 position. You just remove the wires, then put the ohmmeter probes on each connnector where the wire was and see if you get a reading. If not, they are bad.

    You can test the power going to the valves themselves with a voltmeter. This will be testing the wires themselves that attach to the vavle. See if there is 120 volts being provided.

  • Nate Stansfield
    Nate Stansfield Oct 05, 2010

    If you have an infinity reading on the valves, than they are good. If you tested the wires leading to the water valves while the machine is in the fill setting and have no reading, then the control panel is faulty.

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    • Expert
    • 205 Answers

    Hello- It sounds like the flood switch had been tripped. With the kick panel off and the dishwasher unplugged (or the breaker off) feel up and over the plastic tub at the bottom of the dishwasher, this is the part that the fill valve attaches to. If you feel water in there or can see it sitting at the bottom of the pan with a flashlight then the flood switch is most likely tripped. If this is the case then get some pliable rags and find an opening where you can put them into the pan and absorb the water. The flood switch is activated by a styrofoam float that sits about halfway back on the left side of the pan. When you get all or most of the water out (this can take awhile) the flood switch should be disengaged. Plug the machine back in and see if the cycle will start; the machine will probably pump out before it goes into the fill so give it a minute to fill. If you did not find any water in the pan then let me know and I can try to assist you further. Best regards.

    Posted on Sep 29, 2010

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    • Master
    • 8,619 Answers


    Thanks for using FixYa. To start with check the water inlet valve which is located behind the lower access panel on the left or right side of the Dishwasher. If the water inlet valve is bad you have to replace it, also check the main water line for clogs/obstructions. If still the issue is not resolved then it's a bad float switch and needs to be replaced. Please accept the solution if the issue is resolved or post a comment for further assistance.



    Posted on Sep 28, 2010

    • Rylee Smith
      Rylee Smith Sep 29, 2010

      There will be two wires
      connected to the water inlet valve. If your dishwasher's water inlet valve has
      two solenoids, then there will be four wires. Label the wires so that you will
      be able to correctly reconnect them later. The wires are connected using
      slip-on connectors. Grasp the connectors and pull on them firmly in order to
      disconnect the wires from the valve's terminals. Do not pull on the wires
      themselves. You may want to use a pair of needle nosed pliers to help you.
      Use your multi tester to
      test the valve for continuity. Set the device to the ohms setting x 1. Touch
      each of the meter's probes to a terminal. If you receive a reading of infinity,
      it means the valve's solenoid is faulty and the valve needs to be replaced. If
      your valve has two solenoids (four terminals), test the second pair of
      terminals in the same manner. If either pair of terminals receives a result of
      infinity, replace the water inlet valve.


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