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How to mend it .com - Bosch dishwasher SGS43A12GB-27 does not stop filling

I repaired a leak in the sump unit that was causing the base to fill with water. This is now resolved but now the cold feed does not stop at the start of the cycle and so the machine continues to fill unitil I intervene. I can force a pump out by tripping the float switch in the base. Also the main float/pressure switch trips the limit switch as the machine fills but does not stop the feed. The limit switch itself is making/breaking electical contact OK. Can you suggest a possible fault or the next diagnostic step I should take?

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  • bruceleckie Jun 25, 2008

    The inlet valve is working. If I trip the float switch in the base, then the inlet valve closes and the discharge pump starts.

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Possibly the inlet water valve stuck open tho this is rare.

disconnect the valve electrically and see if the fault is still present. if so, the valve is stuck open and needs replacing

Posted on Jun 25, 2008

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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.

Apr 13, 2014 | Bosch Dishwashers

1 Answer

The machine stopped with 33 minutes remaining on 96. There is a "pumping" sound but no water comes in. The dial says it is on rinse but it does not rinse. Bosch Dishwasher EN: SHU4326UC/U12 FD8007. 260415...


If you have water filling up in the sump, you will get that scenario. If water is out of the tub, pull unit out and tilt backwards about 45 degrees. If water comes out from the base(sump), then you know you have a leak and need to have it attended to. Note, if water does come out when tilting the machine backwards, you will find it will work again until base is full again.(Switch off before tilting the machine backwards just for safety.

Jul 21, 2010 | Bosch 24 in. SHU43 Built-in Dishwasher

1 Answer

My dishwasher will not fill with water it just makes a sucking sound


there is a leak in the unit .this is stuck in drain mode.check the drain hose for a pin leak then dry the base out. to get to the base you must take off side panel.

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

1 Answer

My bosch dishwasher will not fill with water. I have manually filled it but it just pumps it out when I switch it on.


the unit is going into drain mode. check your hose for leaks. when water leks in the base of the unit the float switch is activated and the unit will stay in drain mode until the water is removed. check float by removing side panel and look into bottom base for water.

Feb 25, 2010 | Bosch 18 in. SRS45E02 / SRS45E08 Exxcel...

1 Answer

Will not fill. Drain pump runs all the time.


Sounds like flood switch has been activated. They have a float in the base of machine, which will activate drain pump if a leak has occurred. Unplug from power- remove right hand side panel, check to see if any water in base. If so, leak has occurred. Clear water from base and test run to locate leak

Aug 08, 2009 | Bosch Evolution 300 SHE43M05UC Stainless...

1 Answer

Faulty dishwasher.


several poss faults tap turned on? if so probably the unit needs to have the meter tank and feed piping cleaned out. if this is all clean then it could be either the water valve is faulty or you have a leak into the base and the unit will not fill up when it is in "flood mode". (check this out by tipping machine to the side and see if any water pours from the base).

Mar 18, 2009 | Bosch 24 in. SGS57E02 / SGS57E08 Exxcel...

1 Answer

Dishwasher will not take in water


On bosch dishwasher if the base senses a water leak the unit will not fill & the drain pump will come on. I recommend checking for water in the base & locating the source of the leak if you see water in the base. Other possibilities; fill switch, water level switch or water valve. There is no reset for this problem.

Mar 08, 2009 | Bosch Dishwashers

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

Dishwasher does not fill with water


It sounds to me like the base safety float has been activated. This will cause the unit to cancel the program it is in and activate the drain pump, hence the "run" that you hear, but no water. You need to remove the lid and two side panels. If you see water inside the base, you know that the safety float switch has been activated. Remove plug from outlet and empty water from base (by tilting to left side and using sponge to syphon water) Restart unit and check where water is leaking from. Usually from a filling hose not correctly/tightly fitted; leaky inlet valve; leaky heater asembly. Hope this helps! C.

Jun 22, 2007 | Bosch 24 in. SHE44C02UC / SHE44C06UC /...

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