Question about Bosch 24 in. SHU43 Built-in Dishwasher

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Bosch Shu43C02UC dishwasher fills with water but the washing won't start. As the filling nears complete, a double clicking noise occurs to start the washing motor but nothing happens. The time continues to countdown but the machine is silent. When I open and close the door, the click click noise is heard but the machine is silent. I can cancel the cycle and drain the water but none of the washing or rinse cycles will activate but the timer works. The soap door even opens if the timer is left to run. Following instructions for a different problem on this website, I checked the washing impeller and turned it to ensure it wasn't stuck but still nothing.

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  • Bosch Master
  • 3,247 Answers

Have you checked the inlet water temperature is at the correct level for the dishwasher.

Please provide the full model no. of your dishwasher -- Shu43C02UC /??

I think the problem is linked to the thermostat or the heater (if your unit has one).

You can get a better understanding of the parts of the wash circuit by referring to diagrams on this site.

It is diagram no. 4 parts 402 and 409.

I hope this helps. Please rate the solution if helpful or post a comment.

Posted on Nov 07, 2010

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6ya6ya
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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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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.

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1 Answer

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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

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