Question about Bosch 24 in. SHU5305UC Built-in Dishwasher

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Dishwasher won't drain

We just purchased a Bosh in August and the water won't drain. It is making an huming sound.

Thank you,

Debra REnn

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Re: Dishwasher won't drain

I had this problem too! I had connected the waste to a Ubend under the sink which has a side pipe for dishwashers or washing machines. What I didn't notice was that this piece wasn't open, you have to cut the end off!

The engineer was very nice about it when he came and found my mistake, he said it is a common problem!!!

Posted on Dec 29, 2007

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For Miele Dishwasher G2470SCVI Need help with remaining water in the bottom. Model# G2470 SCV1 SF Type-HG03. Runs through the entire cycle,long,short ect..everything is clean and dishes look great but

see this causes 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.

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.

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.

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.
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.
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.

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.

Check Valve If the dishwasher won't drain the check valve might be stuck closed. The check valve is a small plastic 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 the device that the drain hose is attached to on the dishwasher
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.


Sep 28, 2012 | Dishwashers

1 Answer

I have A bosh SKT 2052 Will not fill up to start the cycle

see the following causes:
Make sure you get water to the dishwasher. Check to see if the water shut-off valve (located under the sink) is open. If you get water to the dishwasher, but there is still no water inside during the fill cycle, the problem might be with a faulty water valve (located at the bottom of the dishwasher) see diagram
2) faulty float switch, test for open or faulty.
see the diagram attached.
God bless you


Jul 11, 2012 | Bosch 22 in. SKT5102 Free-Standing...

2 Answers

My model DU810swkqo dishwasher will not drain completely [leaves about a couple of qts of water in the bottom after cycle.It has started dripping water out the bottom of the door.Can or does it need drain...


If the water won't drain from the dishwasher, first manually remove as much water as possible and then check the sump area for paper or any other large object. Make sure the door is properly latched. The pump will not drain if the door is not latched properly. Check the belt, drain line, air gap, drain valve and solenoid assembly, the motor, and the pump. If your dishwasher uses a belt to drive the pump, and it has broken or come off the pulley, replace it.

A cup or so of water in the sump area of your dishwasher is normal. It is there to prevent the seals from drying out. The dishwasher will pump this old water out before beginning to wash.

If you have recently installed a garbage disposer in your home, make sure that the drain plug on the disposer has been removed. It's just a little plastic piece that blocks the hole where you hook the dishwasher drain hose. If your dishwasher drains through the garbage disposer, you need to run the garbage disposer before you run the dishwasher to make sure that the drain is clear.

There is a drain hose between the drain valve or pump and the garbage disposal or drain line. If an obstruction has blocked this, then your dishwasher won't drain. The drain hose is connected by clamps to the drain valve and the disposer or drain pipe. Remove it and visually inspect it for a clog or a kink. Try to remove any debris. If it is in good condition, just put it back on, and if not, purchase a new one to install.

If you don't have an air gap in the drain line, at least use a high drain loop. Making a large loop about 18" off the ground with the drain line can prevent any back flow into the dishwasher from the sink.

If you have one, the air gap will be located on top of the sink. The air gap is there to prevent any siphoning of standing water from the sink. When your dishwasher drains, the air gap diaphragm will form a seal and allow the water to drain properly. If the diaphragm in the air gap is faulty, it's possible that water can leak onto the cabinet and into the sink area. When this happens, then the air gap must be replaced.

Like the inlet valve, there is also a drain valve on most models. When no power goes to the drain valve it remains closed and prevents water from leaving the machine. When the valve receives power during the drain cycle, the solenoid opens and allows the water to leave the machine. If your drain hose is attached directly to the pump, you don't have a drain valve. The motor simply reverses and the pump sends the water in the opposite direction, which is out of the machine.

If the motor doesn't turn or work properly, the dishwasher may not drain. Make sure you have power to the unit. If you notice that the motor hums but won't turn, it could be seized, and you probably need to replace it.

Small objects can sometimes get stuck in the pump. When this occurs, you'll need to open the pump and remove any debris buildup. The dishwasher pump is usually mounted directly to the motor and runs off the motor as well. The pump is also attached to the bottom of your dishwasher and pushes the water from the dishwasher.

Aug 06, 2011 | Dishwashers

1 Answer

Bosh dishwasher modle shu330cu not draining or lighting up

First...make sure you visit the Bosch dishwasher recall website as this model is under the recall with a faulty controller which may cause a fire! Check your model under
then call 800.856.9226 to setup a recall repair appointment. We just found out about this recall and was never notified by Bosch even though we registered our unit after we purchased about poor customer service! Hope this helps!

Jul 12, 2010 | Bosch 23 in. SHU3302UC Built-in Dishwasher

1 Answer

Bosh dishwasher wont fill...also sink drains right intodiswasher.

sounds like your plumbing in your sink is going wrong way check pipes or your sink maybe have a clog in it

Nov 21, 2009 | Bosch 24 in. SHU66C02 / SHU66C06 Built-in...

1 Answer

Does not woork

Has the water drained by the time the dishwasher powers off?
The clicking sound is probably the (failed) pump motor and will require a service call or replacement of the unit.

Mar 27, 2009 | Maytag MDB9600A Jetclean II Built-in...

1 Answer

BOSH won't stop draining

take your dishwasher out and look for a water at the base of your dishwasher.
If that is a water at the botton base, just dry the water and its ok.
if you dont find water at the botton base inside replace the water level system PN= 263834 at, item# 935595 for 41.00 and that part goes in the left side of your dishwasher

May 24, 2008 | Bosch 24 in. SHX46A05 Stainless Steel...

1 Answer

Dishwasher won't drain

the tech that came out may have pinched the drain hose when he put the dishwasher back in place. disconect drain hose from under sink. put dishwasher in cancel/drain mode see if water is coming out at a trickle if so, hose is probably pinched behind dishwasher

Nov 19, 2007 | Dishwashers

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