Question about Bosch 24 in. SHU53 Built-in Dishwasher

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Bosch Dishwasher pump keeps emptying

The pump keeps working on this dishwasher. The float switch is not faulty and there is no water in the sump. Any ideas please?

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  • cerbop Feb 11, 2009

    The pressure switch sounds like an idea. Is it a white unit with several connectors and a microswitch in the middle of it to the right hand side of the motor?

  • cerbop Feb 11, 2009

    This

  • cerbop Feb 11, 2009

    The pressure switch sounds like a good idea. Is it the white unit to the right of the pump with a microswitch in the middle of it?

  • Anonymous Mar 27, 2014

    its not getting water but if I disconnect the hose and connect again it will work... until next time!

  • Anonymous Mar 28, 2014

    The float that switches on the pump doesn't float so the unit doesn't empty properly. The pump does work if you lift it by hand.

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Disconnect the power to the unit. Remove the lower access panels and check the tray under the dishwasher. You will probably find it is full of water. Use a towel or a sponge to remove the water. There is a float that will stop the operation of the unit and run the pump if water is in this tray. Test the unit. If there are no leaks, check the drain hose under the sink. THE DRAIN HOSE MUST RUN UP TO ABOVE THE TOP OF THE MACHINE THEN TO THE DRAIN. If the hose is not set up like this, water from the sink drain will flow into the dishwasher and overflow into the tray under it.

If there is no water in the pan under the dishwasher there may be a problem with the pressure switch at the side of the pump housing but the only way to know for sure is to do some electrical testing with a volt/ohm meter and the wiring diagram located within the appliance.

Go here for Bosch Dishwasher Parts: http://www.repairclinic.com/Bosch-Dishwasher-Parts



www.RepairClinic.com

Posted on Feb 11, 2009

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1 Answer

Bosch SilencePlus shows E:15, Aquastop, and Watertap!


Hi Greg,

E15 on the Bosch units indicated the base switch is activated. There is a safety switch which will activate the drain pump to avoid the base overflowing. Basically you either have a leak or possibly rodents living in the base of your dishwasher.

Easy way to check is first make sure no water is inside the washing area or sump (where the filter is). You will have a dribble there which the drain pump won't pump out but make sure it is mostly empty. The dishwasher always drains at the beginning of a cycle if you need to manually activate this, just turn you tap off so it doesn't try to fill. unplug your dishwasher then pull the machine out and place some old towels along the base and tip if forward. If water run out from the base then you got a leak.

If you are a bit handy then you can take either the front kick plate and cover off or a side panel to look in the base. The float switch is a polystyrene disc which raises and hits a micro switch when the base fills up.

Common place for these to leak is the sump, wash motor or water path / distribution unit. Look for chalky white residue around the seals. Depending on the age of your unit some parts are more serviceable than others. Bosch are pretty good with spare parts so you should be able to source most items you need.

If you are not handy or technical and are concerned about taking on this work, call in a technician. Remember disconnect power before attempting any work. please.

I hope this helps.

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In your case occurred intervention of anti-flooding system.
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First, try to tilt dishwasher and see if leaking water from its bottom.
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Dado

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1 Answer

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