The presenting symptom is that the drain runs constantly (even with the door open), and the DW won't fill. Macmarkus wrote a post on how to test the overflow switch actuator (the little red stick) - his underlying assumption was that there was no water in the pan. What if the switch actuates because there IS water in the pan? What things should be checked? So far, we have replaced the pump assembly, a short hose going to the pump, and then the door gasket. We have watched as it fills, and can't see any drips. The float is up because of the water in the overflow pan - it's doing its job properly. Mining the suggestions on FixYa for what to check next, we find (1) all the gaskets and O-rings in the pump assy, (2) the inlet, components, (3) the drain hose for congealed fat or other obstruction. The DW has at least 6" behind it, so we don't think the drain hose is kinked. As long as my husband has to tear the machine apart, what else should he look at? Thanks in advance.
SOURCE: Bosch Dishwaher shy56a
Certainly sounds like the float is stuck in the over filled position or possible a bad float switch. Could also be a bad water fill valve - if you can blow air through it when removed then you need to replace it. You can follow this link to troubleshoot your washer, but note that its not exactly for your model - http://www.thermador.com/replacementparts/main/pdfs/SHU-complete-troubleshooting-guide.pdf Good luck!
SOURCE: Bosch SHU9925UC Dishwasher Stuck in Initial Drain Cycle
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.
SOURCE: Bosch SHU 4000 series dishwasher; Water keeps on filling
Follow-up: I was able to fix the problem on Bosch model # SHU 4002UC. Purchased water inlet valve (part number 425458) from Sears Parts Center. I required the Sears unit number from the original invoice as Sears computer system apparently cannot identify the Bosch model number. The valve is as described by meyerjr above; however it is located at the bottom front of the machine so could be replaced (not so easily) without removing the machine. Cost of part was $30.50 Cdn including tax.
lwou
SOURCE: Bosch dishwasher: won't fill with water
The flood switch is tripped. This is located under the unit. Unplug or flip the breaker to the dishwasher, take off the black kick plate under the door, 2 screws, and you will see the white plastic "pan". The flood switch is located where you can't really see it but it is on the left hand side wall and is made of styrofoam. The best thing to do is to put some rags in the pan, this is not easy because there is little room to put them, and soak-up the water that has filled the pan. Eventually you will get enough water out that the float will deactivate the switch. What you hear "running" when you turn it on is actually the drain pump, it get activated when the flood switch is tripped.
SOURCE: My Bosch shu3307uc pumps out all the water at the
Hello, welcome to FixYa.
Based on your post I understand you have a Bosch SHU3307UC dishwasher, correct ? Firther to this you.ve stated "slowly fills the bottom between cycles, even with little or no activity at the sink"
It sounds to me like the fill valve is at fault unfortunately. This is a very common problem for Bosch dishwashers of that era.
A faulty fill valve...sticking in the "open" position either due to the plunger in the coil getting stuck or sediment inside the valve body impeding it from closing correctly...Either way you're safer to change it with the history of these valves failing.
This is what to look for... 
As long as your model is indeed a Bosch, this info below will be accurate.
Original part is # 425458. It usually retails for about $20 - $30USD at places such as "searspartsdirect.com" "repairclinic.com" to name a couple, if needed. They may be available at your local brick & mortar parts depot/vendors.
**Before attempting to repair the unit please turn off the power and the water supply to the dishwasher...safety first**
If you remove the lower kick plate/toe panel, you will see the inlet valve to your left...
i.e.
Replacing it or to check for debris in the filter/screen at the inlet is pretty straight forward. Here`s how...
1) undo the water line. ( here you can visually inspect the screen in the valve...if nothing noted, you'll likely need to replace it as follows )
2) Remove the two #20 torx screws fastening it in place.
3) the feed tube to the machine at the back of the valve and swap it with the new one.
and
Once the new one is in or it's all clear you should be good to go.
Let me know if you need any further assistance. Thanks for choosing FixYa and good luck.
Please take a moment to rate the assistance provided here and a brief testimony on your experience here at FixYa is appreciated as well and tell your friends to look for "Macmarkus" on FixYa should they need asistance as well.
Regards,
Macmarkus :)
Testimonial: "The fix was easy and exactly as described, and works perfectly! Thank you very much! If you need any car advice, look me up, I will be glad to help! Bob"
2,701 views
Usually answered in minutes!
×