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Bosch shu43c02uc Hi, My shu43c02uc/40 bosch dishwasher does not drain water. The pump works well when I start it from the overflow mecanism. I mean, the pump evacuates water nicely. The dishwasher does not perform the draining activity for all the programs. The main control board is new. Is there any idea? Thanks.

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  • zerka Jul 23, 2013

    "Thanks Ernesto, The pump and motor assembly are all correct and work when it's activeted manually(i.e. without the unit control). All the mecanism is clean(verified). It seems that when the draining cycle is executed, the draining pump is not activated. "

  • Silke Willibald
    Silke Willibald Aug 30, 2016

    Exact same problem here. Found any solution apart from replacing dishwasher??

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  • Dishwashers Master
  • 12,223 Answers

Test this steps and fix it. God bless you

Belt, Water Pump

Although few dishwashers have a water pump belt, if the dishwasher won't drain there might be a worn or broken water pump belt. After removing the lower kick panel the motor can be seen in the front, the water pump belt is on the bottom of the motor.


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Drain Pump

If the dishwasher won't drain, the drain pump might be defective. Test the pump motor with an Ohm meter. Drain pumps are not repairable, if it's defective it will need to be replaced.


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Drain Impeller

The drain impeller is attached to the pump and pushes the water out of the dishwasher, through the drain tube and into the garbage disposer or drain line. If the dishwasher won't drain, the drain impeller might be broken or worn out. Replace both the impeller and seal at the same time.


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Drain Solenoid Kit

If the dishwasher won't drain, the drain solenoid kit might need to be replaced. The drain solenoid is an actuator that opens a flap to allow the water to drain.


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Drain Valve

The drain valve can get clogged with debris and should be cleaned out if the dishwasher won't drain. If it seems clear of debris but won't actuate, it will need to be replaced. The drain valve is not repairable.


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Pump and Motor Assembly

If the dishwasher won't drain, the pump and motor assembly might be defective. If the motor runs during the drain cycle, check for a blockage in the drain line. If the motor won't run during the drain cycle or if it just hums when it should be running, the pump and motor assembly might need to be replaced.


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Clogged or Improperly Installed Garbage Disposer

If the dishwasher won't drain and the garbage disposer was installed recently, the installer might have forgotten to knock out the drain plug from this disposer. All garbage disposers are sold with a solid plug in the drain tube for situations where a dishwasher isn't connected. However, if the dishwasher is connected, the plug will need to be removed. If the disposer wasn't replaced recently, remove the dishwasher drain hose from the disposer and clean out both the fitting on the disposer and the end of the drain hose. These are the most common places to find an obstruction if the dishwasher won't drain.


Drain Hose

If the dishwasher won't drain the drain hose might be clogged. Remove the drain hose from both the dishwasher and the sink drain to clean it out. The most common place for an obstruction is at the garbage disposer.


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Check Valve

If the dishwasher won't drain the check valve might be stuck closed. The check valve is a device which prevents water from returning to the dishwasher after it has drained. If the valve gets stuck closed, it will prevent the water from draining. The check valve is located in or at the outlet of the pump that the drain hose attaches to. Sometimes the check valve is accessed from the inside of the unit depending on the model.


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Check Ball

If the dishwasher won't drain the check ball might be stuck. The check ball is a small plastic ball in the check valve which prevents water from returning to the dishwasher after it has drained. If the ball gets stuck, it will prevent the water from draining also. The check valve is the device that the drain hose is attached to on the dishwasher.

Posted on Jul 23, 2013

Testimonial: "Thanks Ernesto, The pump and motor assembly are all correct and work when it's activeted manually(i.e. without the unit control). All the mecanism is clean(verified). It seems that when the draining cycle is executed, the draining pump is not activated. "

  • Justin Ray
    Justin Ray Mar 22, 2015

    I have this exact same problem, did you find the fault?

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6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: Bosch SHU43C02UC/47

How to loose up the circulation pump

Posted on Nov 03, 2007

  • 213 Answers

SOURCE: Dishwasher does not start.

remove kick plate from below the door. youll see a white tray behind the kick plate there is water in the tray activating a over flow switch. using a towel remove the water. this will solve the problem

Posted on Nov 20, 2007

IB4G2008
  • 3587 Answers

SOURCE: Bosch SHU9915 Does Not Drain

faulty controls..the signals are apparently getting there, but the machine is intepreting them oddly..may need a new control board behind panel

Posted on Mar 09, 2008

  • 116 Answers

SOURCE: Not starting wash cycle

Typically this means that there has been a water leak of some sort and there is water in the lower base pan. This is the large white plastic base that the dishwasher sits on.

If you remove the toe kick and look back past the fill valve on the extreme left side of the dishwasher about 6 to 8 inches from the front you will see a red stick that goes straight up and down. This is a mechanical linkage that activates the drain feature. Be careful as there are live connections here.

This stick rests on a round piece of Styrofoam that acts as a float. If there is water present it will cause the stick to lift and the dishwasher will go into drain. The source of the leak will have to be isolated and corrected. Most likely it is the fill float assembly as referenced at the end of this post.

If the stick is not in the upright position then there is possibly an issue with the switch mechanism itself.

You will have to pull the dishwasher out from beneath the cabinet and remove the panel covering the left hand side. If it is a full panel then there are a couple of screws holding it on from the front through side trim as viewed when the door is open if it is a half panel then it can be removed by removing the large torx screw on the lower right as seen when facing the panel.

If there is a problem with the switch then the entire mechanism should be replaced.

Try the following link to a picture for reference. It is upside down as compared to the installed one:

http://www.repairclinic.com/SmartSearch/SSPartDetail.aspx?PartID=935595&PPStack=1




Posted on Sep 17, 2008

ginko
  • 19396 Answers

SOURCE: Pump Runs On After Water Is All Drained Out?

If the cycle does not stop draining that is usually because of a faulty water level switch that controls the water level in your appliance.
The faulty sensor cause the machine to think that there is still water inside, even when water has drained completely.
Check if the floating sensor is stuck or faulty.
Some machine may use a membrane switch instead of a floater.

Posted on May 21, 2009

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60f6a31.jpg

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