Question about Bosch 24 in. SHU43 Built-in Dishwasher

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Bosch SHU43C My Bosch SHU43C is stuck with the drain pump running. I ran the self-test and it gave me the fault code 4 wich indicates a filling fault. The washer is empty and all wash cycles display the correct number of minutes for the cycle. It counts down to 0, but the pump continues to run. Does this indicate a stuck float, or is the problem with the control board? Where is the float located? Are diagrams/pictures available on-line anywhere? I've done some searching, but haven't found any. Rick

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My SHU43C is just over 3 years old. I had a similar problem recently. First, there were a few floods. Then, the Bosch only drained non-stop. Even when I used the Cancel Drain buttons the drain pump would run without stopping. When I tried to run one of the cleaning cycles, no water entered the machine. Corrective: I removed the base plate, and saw that the red plastic floatation device was in the up position. Using a flashlight and a wooden spoon, I lightly toggled the red float stem down. I pushed regular clean cycle and kept toggling with the red float stem until the rinse water started to enter the machine (turning the red stem seems to also actuate a step in the program). Now the dishwasher runs normally. Voila!

Posted on Jul 04, 2008

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I removed the lower washer arm, the microfilter basket and the filter-fine. Then I soaked up the remainder of the water, sitting in the drain, with some paper towels. Re-assembled. After a few attempts, the washer ran through a complete cycle.

It still hums loudly when the water is being pumped out, but the washer completes the wash/rinse and stops when the timer reaches 0.

Posted on Jun 23, 2008

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How to run self test on bosche dishwasher


Here is an excerpt from "Bosch Dishwasher Troublesoooting".

Running a Test Cycle
Bosch dishwashers have a test cycle which can be run as a troubleshooting measure. The method to run this test cycle is similar across the Bosch dishwasher range so if your dishwasher features seems different from those described below then try experimenting, as the process is fairly straight forward and will be very similar. Bosch dishwasher model numbers are usually found around the top or lip of the door. One of the most common differences between dishwasher models is simply the names of the buttons. For example in the first example below, POWER SCRUB PLUS and REGULAR WASH may be called WASH and ECO depending on your dishwasher model and the country you are in. The other key difference is whether your dishwasher has a display panel (which can display error codes) or not (in which case a program light will illuminate to tell you the fault.
To run the test cycle hold down the POWER SCRUB PLUS and REGULAR WASH buttons. Whilst held down press the ON/OFF button. The lights above them should flash. Now you can check the status of each dishwasher program by pressing its button. Now you can run the full test cycle = Press the POWER SCRUB PLUS and REGULAR WASH buttons again. The dishwasher will start up and when the cycle has ended one, if you have no display panel on your dishwasher model the indicator lights will illuminate if a malfunction was detected as follows -
CLEAN - A temperature sensor fault. If this is the case then the test cycle will be very short as the dishwasher will terminate the test once it's been detected.
RINSE/DRY - A water sensor/filling fault. If this is the problem then the test cycle will not complete as the dishwasher cannot detect the right level of water, the dishwasher will just keep filling and draining again.
WASH - A heating fault. Check your heating element.
If you do have a display panel on your Bosch dishwasher then after the cycle is complete an error code will be shown if a fault has been detected. The error codes are as follows -
0 - No errors have been detected.
1 - A water sensor/filling fault.
2 - A heating fault.
4 - A water filling fault. This can also appear as F on the display during a normal cycle.
8 - A temperature sensor fault.
When troubleshooting your Bosch dishwasher, running the above test cycle is a good start in diagnosing the problem and should give you an idea of where the problem lies with your Bosch dishwasher and what fixes and repair are in order. Our general troubleshooting page will give you some ideas on other things to check on your dishwasher. Good luck!

Mar 29, 2013 | Bosch 24 in. SHU5305UC Built-in Dishwasher

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

Have a shu 4322 dishwasher it fills with water and drains but the spray arms do not spray. have not tried anything yet.this dishwasher is not hooked up. it was given to me by a friend who replaced all his...


Hello,

Welcome to FixYa.


There was indeed a recall involving the control replacement nearly two years ago now if I recall.

As for checking into the present issue ( it doesn`t sound like anything to do with the control based on your description ) it sounds like the pump impeller may have become stuck. Did the dishwasher sit idle or in storage unused for a period of time ?

I have a service bulletin I could send you via email regarding remedying that issue of stuck impeller if you contact me at macmarkus@live.ca

I`d suggest you run the dishwasher through a diagnostic, but either procedure will require hooking it up.

To do this test/diagnostic on the SHU4322 series machine, it is as follows...

To start test program, press and hold both REGULAR WASH and RINSE & HOLD program buttons, then turn unit on by pressing ON/OFF button. Initially, control module version # will be displayed (e.g./ "20" = version 0 without jumper).

When wash program buttons are released, lights above them will flash. To end test program, press ON/OFF button.
To check each program indicator light, press its button. To check Cycle Countdown display, Refill Rinse Agent light and REGULAR WASH light, press REGULAR WASH button (press Delay Start button to test Cycle Countdown display alone).

Cycle Countdown display will show "88" when REGULAR WASH button is pressed and "8h" when Delay Start button is pressed.
To start testing, press both the REGULAR WASH and RINSE & HOLD buttons a second time.

When testing has ended, Cycle Countdown display will show a fault using codes below. If more than one fault occurs, code numbers will be added together, (e.g./ "6" = faults 2 + 4).
0 = No faults detected 2 = Heating fault 8 = NTC (temperature sensor) fault 1 = Aqua Sensor ("Sensotronic") fault 4 = Filling fault F = Filling fault (display occurs during wash, not test)

0 = No faults detected
1 = Aqua Sensor ("Sensotronic") fault
2 = Heating fault
4 = Filling fault
8 = NTC (temperature sensor) fault
F = Filling fault (display occurs during wash, not test)


To check for heater, high limit or flow switch problems, start testing until heating starts. Using a meter with a current coil, measure current going into dishwasher. If current is ~ 11 A, then heater, high limit and flow switch are OK. If current stays at ~ 1.5-2 A, then heater, high limit or flow switch are faulty.

i.e.

86c0a8d.jpg

If water level switch has failed (opened), display will show fault code "4" and unit will continually fill and drain where testing won't be completed. If flow switch has failed (opened), display will show "0", water won't heat (to 150?F) and water won't stop circulating. If NTC probe has failed (opened), display will show fault code "8" immediately and testing will end shortly after water has started circulating.


What needs to be done to solve the problem will depend on the results/findings of the dianostic, so let me know what you find and we can go from there.

Either way keep me in the loop and I`ll assist you the best I can. Thank you for choosing FixYa and good luck.

Regards,

Macmarkus :)

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

1 Answer

Water won't drain


Do the diagnostic test:
SHU 53 MODELS

To start test program, press and hold both SCRUB WASH and DELICATE/ECONO program buttons, then turn unit on by pressing ON/OFF button. Initially, control module version # will be displayed (e.g./ ?21? = version 1 with jumper). When wash program buttons are released, lights above them will flash. To end test program, press ON/OFF button.
To check each program indicator light, press its button. To check Cycle Countdown display, Refill Rinse Agent light and REGULAR WASH light, press REGULAR WASH button (press Delay Start button to test Cycle Countdown display alone). Cycle Countdown display will show “88′ when REGULAR WASH button is pressed and “8h” when Delay Start button is pressed.
To start testing, press both the SCRUB WASH and DELICATE/ECONO buttons a second time. When testing has ended, Cycle Countdown display will show a fault using codes below. If more than one fault occurs, code numbers will be added together, (e.g./ ?6? = faults 2 + 4).
0 = No faults detected 2 = Heating fault 8 = NTC (temperature sensor) fault
1 = Aqua Sensor (“Sensotronic”) fault 4 = Filling fault F = Filling fault (display occurs during wash, not test)
To check for heater, high limit or flow switch problems, start testing until heating starts. Using a meter with a current coil, measure current going into dishwasher. If current is ~ 11 A, then heater, high limit and flow switch are OK. If current stays at ~ 1.5-2 A, then heater, high limit or flow switch are faulty.
If water level switch (f1) has failed (opened), display will show fault code “4′ and unit will continually fill and drain where testing won’t be completed. If flow switch (e5) has failed (opened), display will show “0′, water won’t heat (to 150?F) and water won?t stop circulating. If NTC probe (f2/f4) has failed (opened), display will show fault code “8′ immediately and testing will end shortly after water has started circulating.
---------
The dishwasher not draining is most probably faulty drain pump or drain hose is got bit loose.It has to be checked and confirmed
.You can get required parts from www.repairclinic.com
Thanks. Keep updated for any more query. You can rate this solution and show your appreciation.

Aug 27, 2010 | Bosch 24 in. SHU53 Built-in Dishwasher

1 Answer

The dishwasher has been running for 3 hours and seems to be stuck on 1 minute left. Upon opening, there was sudsy water remaining in the bottom, but the dishes looked clean. The washer just won't go to...


SHU 53 MODELS To start test program, press and hold both SCRUB WASH and DELICATE/ECONO program buttons, then turn unit on by pressing ON/OFF button. Initially, control module version # will be displayed (e.g./ ?21? = version 1 with jumper). When wash program buttons are released, lights above them will flash. To end test program, press ON/OFF button. To check each program indicator light, press its button. To check Cycle Countdown display, Refill Rinse Agent light and REGULAR WASH light, press REGULAR WASH button (press Delay Start button to test Cycle Countdown display alone). Cycle Countdown display will show ?88″ when REGULAR WASH button is pressed and ?8h? when Delay Start button is pressed. To start testing, press both the SCRUB WASH and DELICATE/ECONO buttons a second time. When testing has ended, Cycle Countdown display will show a fault using codes below. If more than one fault occurs, code numbers will be added together, (e.g./ ?6? = faults 2 + 4). 0 = No faults detected 2 = Heating fault 8 = NTC (temperature sensor) fault 1 = Aqua Sensor (?Sensotronic?) fault 4 = Filling fault F = Filling fault (display occurs during wash, not test) To check for heater, high limit or flow switch problems, start testing until heating starts. Using a meter with a current coil, measure current going into dishwasher. If current is ~ 11 A, then heater, high limit and flow switch are OK. If current stays at ~ 1.5-2 A, then heater, high limit or flow switch are faulty. If water level switch (f1) has failed (opened), display will show fault code ?4″ and unit will continually fill and drain where testing won?t be completed. If flow switch (e5) has failed (opened), display will show ?0″, water won?t heat (to 150?F) and water won?t stop circulating. If NTC probe (f2/f4) has failed (opened), display will show fault code ?8″ immediately and testing will end shortly after water has started circulating.

Aug 01, 2009 | Bosch SHU5315UC Dishwasher

1 Answer

Bosch SHU 6800 Water hot at sink only luke warm at the washer


BAD CONTROL BOARD TO TEST TO SEE IF THIS IS THE ISSUE RUN TEST PROGRAM
To start test program, press and hold both SCRUB WASH and DELICATE/ECONO program buttons, then turn unit on by
pressing ON/OFF button. Initially, control module version # will be displayed (e.g./ “20” = version 0 without jumper). When
wash program buttons are released, lights above them will flash. To end test program, press ON/OFF button.
To check each program indicator light, press its button. To check Cycle Countdown display, Refill Rinse Agent light and
REGULAR WASH light, press REGULAR WASH button (press Delay Start button to test Cycle Countdown display
alone). Cycle Countdown display will show "88" when REGULAR WASH button is pressed and "8h" when Delay Start
button is pressed.
To start testing, press both SCRUB WASH and DELICATE/ECONO buttons a second time. When testing has ended,
Cycle Countdown display will show a fault using codes below. If more than one fault occurs, code numbers will be added
together, (e.g./ “6” = faults 2 + 4).
0 = No faults detected 2 = Heating fault 8 = NTC (temperature sensor) fault
1 = Aqua Sensor ("Sensotronic") fault 4 = Filling fault F = Filling fault (display occurs during wash, not test)
To check for heater, high limit or flow switch problems, start testing until heating starts. Using a meter with a current coil,
measure current going into dishwasher. If current is ~ 11 A, then heater, high limit and flow switch are OK. If current stays
at ~ 1.5-2 A, then heater, high limit or flow switch are faulty.
If water level switch (f1) has failed (opened), display will show fault code "4" and unit will continually fill and drain where
testing won't be completed. If flow switch (e5) has failed (opened), display will show "0", water won't heat (to 150ºF) and
water won’t stop circulating. If NTC probe (f2/f4) has failed (opened), display will show fault code "8" immediately and
testing will end shortly after water has started circulating

Jul 18, 2009 | Bosch 24 in. SHU43 Built-in Dishwasher

1 Answer

Bosch SHU43C installed in 2003


My Bosch SHU43C had the same exact problem. I found the below solution on this site. Perhaps you already seen it.

My SHU43C is just over 3 years old. I had a similar problem recently. First, there were a few floods. Then, the Bosch only drained non-stop. Even when I used the Cancel Drain buttons the drain pump would run without stopping. When I tried to run one of the cleaning cycles, no water entered the machine. Corrective: I removed the base plate, and saw that the red plastic floatation device was in the up position. Using a flashlight and a wooden spoon, I lightly toggled the red float stem down. I pushed regular clean cycle and kept toggling with the red float stem until the rinse water started to enter the machine (turning the red stem seems to also actuate a step in the program). Now the dishwasher runs normally. Voila!

Aug 07, 2008 | Bosch 24 in. SHU43 Built-in Dishwasher

3 Answers

Bosch


f is fill fault to much or not enough water or water in the sump white plastic base the f code will not go away until you solve the problem when the f code shows up the drain motor will run all of the time

Apr 01, 2006 | Bosch 24 in. SHU6802UC / SHU6806UC...

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