Question about Bosch 23 in. SHU 8805 Built-in Dishwasher

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Bosch SHU9925UC Dishwasher Stuck in Initial Drain Cycle

When dishwasher is started the initial drain cycle comes on. It drains any remaining water in tub, but then drain pump just stays on and never moves into fill cycle.

I read your solution to another Bosch model. I removed the inlet valve to vacuum out any water from the underpan from a "flood" problem. The pan was bone dry. I also had checked and cleaned the drain and impellers to be sure they were clear. I also tried to cancel the cyle buttons and restart.

None of these actions solved anything. I am going to test the inlet valve solenoid and check the intake filter today. I saw that checking for a stuck float may also be a problem, but I am not sure where it is. When I look back behind the inlet valve with a flashlight, I can see a small styrofoam looking donut, but it is sitting flat on the bottom.

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  • dcomfort Apr 09, 2008

    I read on appliancepartpros.com blog how someone took off their side panel; the two torx screws inside front rubber door seal. I was then able to get to everything below. The drain pan was dry, but I jigged the red float bar to the float switch a few times and it cycled out into the water fill cycle.



    The dishwasher is starting to run. I'll observe the cycle and see if all goes well.

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OK Bosch Dw fans.........here is the fix if your SHX dishwasher is stuck on the drain cycle. This may save you a couple hundred bucks.......so listen up. There is a tendency for the very small float switch to STICK in the ON position, which will cause the drain motor to continuously run......and DISallow any other function to work. DISCONNECT POWER. Did I mention to disconnect power? Take off the front base cover....2 torx screws. Remove the other 2 torx screws in the metal clips that fasten the top of the DW to the underside of your countertop. NOW...carefull slide your DW out. You may have to disconnect your water and elec supply if you do not have enough slack to pull it out. Once the DW is out of the cabinet, remove the shiny metal cover on the LEFT side by removing a single torx screw. You will now see a small plastic assembly with a red plastic piece that moves up and down as it rides on a small red styrofoam float. This up and down movement engages a small white plastic switch visible with 3 wires coming out of it. You can carefully UNSNAP this switch out of its mount, and pull the 3 wire plug off of it. THere is a small square blue plastic tab that is supposed to easily slide in and out of the switch. If it is stuck IN, you can sometimes tap the switch and the blue tab will pop out, which is what it is supposed to do without tapping it. You can carefully with a knife blade separate the case on this switch and note the way it comes apart. Clean out any micro debris out of the small channels that the blue tab ride up and down in. Then set it in the channel while holding up the small switch tab that rides on it and see if it slides up and down without sticking! I like to take a piece of wax paper and rub in on the channel and blue tap to provide some lube for the switch to slide easily on. Now, put the switch back on and manually move the red plastic assembly up and down while you are watching the blue tab. The tab should ride up and down with the red assy. If not, buy a new switch. Google the # on the switch and order one. If the tab slides up and down, put things together in reverse order and give it a try. Hope it works for you. This should take you an hour give or take. Take the $200 you just saved and have a night out on me. ........so even though these German Appliances have a good name because of past reliability, the american tendency to value engineer them with plastic parts to reduce costs and increase profit.........just cost you an hour of your time. Will we ever learn.? ......if it ain't broke, value engineer it until it only lasts through the warranty period so you can then collect service and parts blood money from your fellow american.

Posted on Jan 11, 2009

  • 2 more comments 
  • ooawoo_fixya Feb 22, 2011

    This article was helpful. In my case, there was water in the flood pan and the float was activating the pump switch. I then discovered that the water inlet valve was leaking into the pan, so the flood pan and float were doing what they were designed to do. Now I'll just have to replace the inlet valve to stop the leak.

  • Justn
    Justn Jan 18, 2014

    I checked the switch, and operating fine, and not stuck in flood position. I also checked voltage across the solenoid in the operating position, and it's still not getting any current (no voltage read across solenoid) to energize and open. Any ideas?

  • David Fleming
    David Fleming May 02, 2014

    After I ran the diagnostic test, it ran perfectly :)

  • David Fleming
    David Fleming May 02, 2014

    Diagnostic testing info:http://fixitnow.com/wp/2005/10/12/bosch-...

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Way to go!

The plastic lever / switch assembly may have got hung up. Or the flood switch (the microswitch activated by the styrofoam float) may be the problem. If this happens again, I recommend replacing both, because it's a lot of labor to do one, and not much more to do the other.

Let's hope that doesn't happen!

Posted on Apr 09, 2008

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Please try this at your own risk of course!

I had exactly the same problem. The DW just wouldn't stop draining. I read the description above, about the plastic parts.

BUT before opening anything, I pulled the DW out a little and then shook it up and down.. not too much, but enough to get the valve system unstuck!

Lo behold - the DW is now running like before. Again, please try at your own risk.

Posted on Aug 11, 2015

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Posted on Jan 02, 2017

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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.
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One of the reasons for motor not draining during normal cycle is the check valve is stuck. It is meant to return to normal during drain cycle but close during wash. I think the cancel is resetting it and letting water out.
See this discussion.

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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
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9_29_2012_12_23_59_pm.gif9_29_2012_12_24_31_pm.jpg

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1 Answer

Water enters dishwasher,the unit seems to go on hold, then it will drain. Nothing else works as far as the washing cycle or any thing else.


this could be that the main pump id defective, once water enters the main pump does all the work to throw the water around and clean, once that is done the water is drained etc.
so when you dont hear anything this indicates that the main pump is not running.

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2 Answers

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Hi

Kindly check for the following :

Check for hose kinks or food plugging drain hose. Start at the drain port exit.
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93cb8b1.jpg

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A Fixya Rating would be appreciated if.

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Normal fault for this condition would be:
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