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Drain pump running as in flood protect mode even with door open, At first I thought the float was sticking due to sludge deposit.

I have cleaned all the pipes and tubes, the float is operating normally, there is no water in the bottom float area. Lifting the float bar up or down makes no difference, I have tested the micro switch with an ohmmeter. Even in rinse cycle the water tries to fill up with the float switch starting and stopping the water but the drain pump is emptying constantly.

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  • 395 Answers

The main controller and circuit board may have a short. Switches take their instructions from the main board and if a power surge or power outage occurs, one or more diodes, resistors or capacitors are faulty.

Posted on Mar 30, 2015

  • David Clark
    David Clark Mar 30, 2015

    I assume you mean the control board takes its instructions from the micro switches, yet with the micro switch disconnected I can read no shorts where the switch connects to the control pcb. None of the diodes or caps read oc or sc, there has been no power failure or surge.

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1 Answer

Dishwasher floods kitchen


I've got the same problem. They have a pump that sumps out the dirty dishwater and a float that tells them the water level. Food and calcium deposits make things bind up. There is rubber seals on the door that need to be just right. "Dishwasher floods kitchen" doesn't really help much. I knew my pump was clogged or bad because it wouldn't drain. I haven't fixed mine. We have an Amana and it never did a good job cleaning anyway.

Jan 03, 2015 | Dishwashers

1 Answer

As I turn the unit on, it sounds like the dishwasher is starting but no water is being dispensed. Any thoughts?


Hi,

The most likely reason is the float switch (anti-flood protection system) has been tripped and the noise you can hear is the drain pump running continuously despite the washer being empty. If this noise continues even with the door open, it's definitely the float switch. This could be a faulty switch, a stuck float, or water may have leaked into the bottom of the machine below the tub.

It would help if you could specify a model number as the flood-protection components vary between models. If you don't know the model number, you should be able to find it laser-etched at the top of the stainless-steel inner door.

Hope this helps. If you need further assistance, please specify a model number and whether the washer seems to be "running" with the door open.

Regards, BElectric

Oct 09, 2011 | Bosch Dishwashers

1 Answer

Bosch SHU runs even when the door is open, what do i need?


Hi Jeffrey,

This depends what you mean by "runs". If the dishwasher continues with a wash cycle - i.e. circulating water - with the door open, the simple answer is that you have a defective door microswitch.

However, I suspect what you perceive to be the dishwasher running, is actually the drain pump running continuously. This happens when the anti-flood protection system has been activated and continues even when the door is opened. The simplest way to check is to open the door (while it's "running") and pour some water into the tub. If the water drains away immediately, this shows the drain pump is running and the anti-flood protection has been activated.

This may be due to water having leaked into the base of the dishwasher, but it could be as simple as a stuck or defective float-switch.

Please try the simple test above then post back for further assistance. If you're planning to investigate or repair this yourself, you're going to need a Torx T20 screwdriver and a multi-meter would be useful as well.

Regards, BElectric

May 25, 2011 | Bosch SHU9915UC Dishwasher

1 Answer

I have a Bosch Exxcel dishwasher which runs the drain pump constantly even with the door open and despite there being now water in the machine at the cycle wont start. I have checked the warer amtrix and...


I am not sure about this model but most models run a drain cycle for a set period at the start of a wash cycle and then move on to normal filling and cycle of machine provided the various switches are at the low level it will carry on to its set cycle,is the apartment or flood switch ok?

Jun 30, 2010 | Bosch 24 in. SGS47E02 Exxcel Free-standing...

1 Answer

Bike floods its self constantly, i drain the carb bowls, it starts then floods after not even 1 minute of running....


The fuel is probably flooding due to trash in carb, remove the fuel bowl,clean float needle,clean jet and the orfaces in it.(if dirt is in it clean the rest of the fuel system to keep it from happening again.) Spray cleaner does good.

May 12, 2010 | 2000 Honda CBR 600 F(4)Y

1 Answer

Pump will not shut off even with door open


Hi, There is a float under the dishwasher to protect from flooding... If there is a leak and there is water under the dishwasher in the pan then the float switch will turn on the drain pump...
first I could remove the toe panel check in the pan for water... if no water still check the float it maybe stuck up (soap can get under the float and hold it up)
remove water and make sure float in down... if not you may need a new float switch...

Sep 28, 2009 | Bosch Evolution 800 SHE68M05UC Stainless...

4 Answers

Fault code f70, drain pump keeps running, nothing else works


Hi,

Yes. F70 is a flood in the base of the unit which activates the float switch and constantly activates the drain pump until the water has gone. Isolate the unit at the power switch and remove the bottom panel under the door panel. Dry up the water as best possible with a towel. You will see the float at the front. Run the unit again and check for any water leaks. You may just have over sudded the unit with too much detergent. Only use 2 teaspoons of powder. To start with while testing don't use any detergent. Good luck

Hope this helps.

May 29, 2009 | Miele Optima G2470SCVi Built-in Dishwasher

2 Answers

Bosch SHU43C Dishwasher


Is there no water coming in( hear no water at all) or no water NOT staying in ( drain motor running) ... the float switch is a safety to keep the dishwasher from flooding ...turns on the drain motor as soon as the door is closed..

I could check the control and see if you have power to the water valve.. maybe a control problem if no power..

Sep 22, 2008 | Bosch 24 in. SHU43 Built-in Dishwasher

2 Answers

SHU43 running constantly


Intrrnal leak into base of appliance will make drain pump run constantly.
If appliance fills then dumps water with drain punp then keeps filling/draining sequence then the flow meter could de faulty.
Call in engineer.
Paul Winn Appliance Services (Cumbria)

Apr 02, 2008 | Bosch 24 in. SHU43 Built-in Dishwasher

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