Question about Bosch 24 in. SGS43C12 Classixx Free-Standing Dishwasher

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The washer floods at the end of the cycle the pump is working this i know because when i manualy lift the mushroom float it pumps out could it be that there is a membrane in the mushroom float that is split thus not pumping out when it should

Posted by Anonymous on

  • E Johnson-Baker Jul 07, 2013

    Hi Ive the same problem all works ok wash cycle finishes no leaks at all, goes into dry mode and water appears on the floor.have turned of water supply and it still leaks at ens of wash cycle help please as I would love to repair. Bought a hoover to replace bosh tempory while I get the bosh repaired

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Hi there,

I'm not entirely sure what you mean by "floods at the end of the cycle". Is water leaking from the washer and where from?

The mushroom float isn't a water level sensor to determine when the washer should pump out. It's a second level safety feature to prevent flooding if the washer overfills. The flow meter regulates the water level in the washer.

Your pump is obviously working and there is no blockage in the drain hose, etc as the water pumps out when you lift the mushroom float. It sounds like the pump isn't receiving a signal from the controller to pump out at the end of the wash cycle. Lifting the float bypasses the controller and runs the drain pump.

Please try the following simple test:

1. Switch the programme selector to "Off"
2. Empty a bucket of water into the bottom of the washer
3. Turn the programme selector to any wash cycle
4. Press and hold the Reset button (start/stop) for at least 3 seconds. The washer should drain.

Please try this test and let me know if the washer pumps out. Please can you also be a little more specific about how and where the washer is flooding.

Thanks,
BElectric

Posted on Mar 17, 2011

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1 Answer

Bosch SL1501B dishwasher doesn't drain water after the washing cycle. Also with new drain pump. What else could it be?


Check the following.
1. The drain hose has to be discharging at a high enough point to prevent water flowing back into the machine.
2. Make sure your drain hose is not twisted or kinked.
3 . Make sure your drain line is not blocked push a flexible hose down it to dislodge any fat/debris
4.If your drain line discharges into a shared drain with another appliance i.e. garbage disposal make sure it is not blocked.
5. You may have a blockage at the inlet to the pump which would slow down the pumping rate,
Since you mentioned the mushroom shaped float allowing the washer to empty this may be defective.
See the link attached.
Hope this helps.
Crofter

Bosch Dishwasher Does Not Drain

Apr 30, 2015 | Bosch Dishwashers

1 Answer

I HAVE A BOSCH DISH WASHER SGS43A32GB/01 WHICH APEARS TO FLOOD NEAR THE END OF CYCLE


check base for leaks or holes. This is a very thin sheet of stainless steel that gets easily punched if some heave shart or pointed cutlery is falling onto it. also check proper operation of float switch underneath it.

Feb 01, 2012 | Dishwashers

2 Answers

Hi My dishwasher seems to get stuck in a cycle when you start it - it lets water in for around 20 secs - then pumps it out - then lets water in for say 20 secs then pumps it out - over and over and...


Hello Gerard,

This is an overfill 'fault' generally caused by one of the following:

1. Faulty or incorrectly installed flow-meter
2. An airlock in the fill chamber
3. Faulty float switch (less likely)

There are some simple checks you can do to determine the cause of the fault and hopefully solve the problem without replacing any parts - no tools required at this point.

First, open the door, pull out the lower basket and locate the float. This is the 'mushroom' in the base of the washing compartment:

belectric_200.jpg
With the washer empty of water, make sure the float is fully lowered. There should be a gap of 2-3mm between the float and the base of the washer and you should be able to lift it about half an inch / 12-15mm. When you lift it, it should fall when you let go. If it's raised when the washer is empty, it should not rise again on its own when pushed down.

If the float seems to be working correctly, the controller is receiving erroneous signals from the flow-meter that the washer is full or overfilled. This causes the washer to pump out - then resume the fill cycle because the water level is too low to start the wash. If this is caused by an air-lock, there is a simple trick to clear the air-lock and, therefore, the fault.

1. Start a wash cycle and keep you finger ready on the power switch on the control panel.
2. As soon as you hear the pump start during the fill cycle, interrupt the cycle by pressing the power switch to the off position
3. Wait for about 10 seconds, then switch the power on again.

The machine should resume filling rather than pumping out. Keep your finger ready on the power switch and repeat steps 2 and 3 until the washer is filled and the washing cycle starts. If you can get the washer to run a cycle using this trick, you may not need to do anything else, but you may need to repeat the procedure described above at the start of the next few cycles.

If the washer does not resume filling and continues pumping when you switch the power on again or you have to repeat the procedure above at the start of every wash cycle before it will run, you will need to check the flow-meter and, most likely, replace it.

I'm happy to provide step-by-step assistance with checking and replacing the flow-meter if required, but please check the float and try the simple trick above first, then let me know if you need further assistance.

Hope this helps.

Regards,
BElectric

Apr 24, 2011 | Bosch 24 in. SGS43C12 Classixx...

1 Answer

Hello I have a Bosch dishwasher model no:


Hello Zub,

It's most likely a fault with the control module or the drain pump. Please follow these instructions to detemine the likely cause of the fault and, therefore, what to do next:

1. Turn the programme selector to any wash cycle but don't press start.
2. Open the door and pull out the lower rack
3. If the washer is dry, pour roughly a pint of water into the sump in the bottom of the washer
4. Locate the float (the mushroom) and lift it . . .

belectric_178.jpg
When the float is fully lifted (about 3/4 of an inch) the drain pump should start and drain any water from the washer. This activates the anti-flood safety feature and the pump should continue to run as long as the float is lifted. The power supply to the drain pump bypasses the controller so this is the best way to determine if the drain pump is faulty.

If the water drains when you lift the float . . .

The drain pump is working but it's not receiving the signal to start from the controller during a wash cycle. It may be a wiring problem, but more likely that your control module will likely need to be repaired or replaced. These cost about £100 - if you replace it yourself.

If you can hear the pump humming but water does not drain when you lift the float . . .

There may be a blockage somewhere or the pump impeller may have jammed or broken away from the driveshaft. Try lifting and dropping the float rapidly about 10-20 times. Repeated stop/start signals to the pump motor can free a stuck impeller.

If nothing happens when you lift the float . . .

There is either no power to the pump motor or, more likely, the pump motor has failed. You will need to test the motor to determine whether or not it needs to be replaced. You will need a Torx T20 screwdriver or screwdriver bit to remove the kickplate under the door and an ohm / multi-meter to test the motor.

The drain pump motor should give a resistance reading of between 110 and 260 ohms across the live/hot and neutral/common terminals if the motor is good. In most cases, the reading is about 160-170 ohms.

I'd suggest testing the drain pump using the float as detailed above, then let me know the results. I'm happy to provide further assistance once the likely cause of the fault has been determined.

Hope this helps.

Regards,
BElectric

Apr 10, 2011 | Bosch Dishwashers

1 Answer

We have a bosch classixx free standing dishwasher and the base is filled with water, we ve removed the filter but there doesn t seem to be anything there causing the blockage.any ideas?


Hello Becky,

The most likely causes are a failed drain pump motor (or capacitor) or a jammed/broken pump impeller. There is a very simply simple test on classixx models which which help you to determine the cause, or where to look next.

1. Turn the wash cycle selector to any wash cycle so the "ON" light is illuminated, but do not press the START/STOP button.
2. Open the door and pull the lower basket out.
3. Locate the 'float', lift it up fully and keep it held up.

(The float is a dome/mushroom shaped protrusion in the base of the washer just to the left of the drain and partially hidden by the spray arm)

When you lift the float, the drain pump should run instantly and the water should drain from the washer. If you can hear a low hum from the pump motor in the base of the washer, but the water doesn't drain, then it's likely that the pump impeller is jammed or it may have broken away from the spindle. If this is the case, try repeatedly lifting and dropping the float fairly rapidly. Repeated stop/start signals to the pump motor can sometimes free a stuck impeller.

If you cannot hear any noise from the base of the washer when you lift the float, then the drain pump motor or the motor capacitor may have failed. A failed capacitor is often accompanied by a buzzing noise. Further testing will be required to determine the exact cause of the fault.

Please try the simple test above and then post back with the results for further assistance.

Hope this helps.

Regards,
BElectric

Mar 05, 2011 | Bosch 24 in. SGS43C12 Classixx...

1 Answer

Water sounds like its comming to dishwasher after awhile dial turns(timer) disher wsher goes in to dishcharge pumping out water but inside of dish washer seems dry like no wash cycle took place


Look inside the dishwasher for large plastic mushroom-shaped thing in the bottom. This is a float. Sometimes a knife or fork or something else gets in the bottom of the dishwasher and won't let the float go down. When the float is up like this, the dishwasher thinks that it is already full of water, so no water pumps in.
If this is the case, simply remove whatever is blocking the float from going down, and it will work again.

Feb 28, 2011 | Asko D1706 Built-in Dishwasher

1 Answer

When starting the dishwasher there is only a hum but nothing else happens


The first thing a Bosch dishwasher does when you start a program is run the waste pump. This ensures that any residual water and waste is removed from the machine before the wash program begins.

The hum you can hear is most likely the pump motor trying to drive the impeller. This can become clogged with waste and seize up, preventing the wash cycle from starting. There is an easy way to check this:

(It's easier to do this with the washer empty)

1: Select a wash program

2. Press "Start" and wait for the humming noise

3. Open the door and pull the bottom basket forward or lift it out completely

4. Find and lift the float (the plastic dome/mushroom in the bottom of the washer) all the way up

5. Keep the float lifted and the dishwasher should pump out. Stop if/when you hear a gurgling noise as this means it's empty and pumping mostly air.

6. If the pump doesn't start, lift the float again for about 1-2 seconds then let it drop again for 1-2 seconds. Repeat this 10-20 times and see if the pump starts. The repeated stop/start signals to the pump motor can sometimes free a seized impeller.

If the pump does start, keep lifting and dropping the float switch (1-2 seconds each time) to see if the pump starts every time. If it does, you should be OK to use the washer, but further action is needed to stop the problem returning.

When you've done all this, post the results here and I'll advise you what to do to fix the problem or prevent it from returning.

Oct 10, 2010 | Bosch 24 in. SHU43 Built-in Dishwasher

1 Answer

Shu3302uc/u12 will not pump out


It's most likely a seized pump impeller/motor bearings or a burnt-out pump motor. There are some simple tests for the pump that anyone can do:

A. If your washer is full of water:

1. Select a wash program and press start. You should hear a low humming noise. If you can't hear anything, you probably need a new pump, but try the next step before you start buying parts or call an engineer.

2. Open the door and pull the lower basket forward or lift it out completely. Find and lift the float (the plastic dome/mushroom in the bottom of the washer) all the way up. Keep the float lifted and the dishwasher should pump out. Stop if/when you hear a gurgling noise as this means it's empty and pumping mostly air.


B. If your washer is empty of water:

1. Select a wash program and press start

2. Open the door and pull the lower basket forward or lift it out completely. Find and lift the float (the plastic dome/mushroom in the bottom of the washer) all the way up. Keep the float lifted and the dishwasher should pump out. Stop if/when you hear a gurgling noise as this means it's empty and pumping mostly air.

C: If you can hear the low humming noise but the pump doesn't start when you lift the float:
1. lift the float again for about 1-2 seconds then let it drop again for 1-2 seconds. Repeat this 10-20 times and see if the pump starts. The repeated stop/start signals to the pump motor can sometimes free a seized impeller.

If the pump does start, keep lifting and dropping the float switch (1-2 seconds each time) to see if the pump starts every time. If it does, you should be OK to use the washer, but further action is needed to stop the problem returning.

When you've done all this, post the results here and I'll advise you what to do to fix the problem or prevent it from returning.

Oct 08, 2010 | Bosch 24 in. SHU43 Built-in Dishwasher

1 Answer

BOSCH DISHWASHER Flooding


Removing the water level sensor it is not a difficult operation, it is held with one bolt at the base of the floater arm.

The problem is that you cannot be sure that the floater is not working unless you find out that the floater is filled with water or stuck.

There is an electronic test to verify if water level switch activated by the floating sensor is working. Instructions here: Bosch dishwasher helps.

You can find replacement water level switch , and schematics on websites below:

BSH - Bosch Customer Service

Appliance411: Repair Parts

how to mend it .com - ~~ Wiring diagram for BOSCH Dishwasher.


Feb 07, 2009 | Bosch 18 in. SRS45E02 / SRS45E08 Exxcel...

1 Answer

Pum continue running and never end cycle


Ok,

So you know how to get to the float mechanism. I also noticed that when i lifted the red anti flood pole the pump keeps going & also the float will not move because if you add water to the small chambe it runs away as it should do. The next thing i tried was to unplug the electronic float switch. I use alot of these devices in my line of work & sometimes they stick. By unpluging it & seemed to do the trick once reinserted the pump has stopped. To double check just lift the red pole & the pump will start again as if it has registered a flood alert. Problem solved & £300 better off. Note if it still runs after this, the switch could be at fault they cost pennies to replace. Good luck

Nov 04, 2008 | Neff 24 in. S5456 Built-in Dishwasher

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