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My Bosch SHU43C will sometimes make a loud noise

My Bosch SHU43C dishwasher will sometimes make a loud noise while the dishwasher is running. When this happens I open the dishwasher door and restart it and the noise stops. What is happening? Is it expensive to repair? Should I just replace the dishwasher?

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It may be more cost affective to just replace this unit. the circulation motors that are used in these dishwashers are not reliable. the wash impellers seems to have issues dealing with staying attached to the drive stud and shaft. this will cause the impeller ti shift inside the housing, causing noise and jams.

A new circulating impeller kit will cost about 100 dollars and, labor for this type of repair is 80 dollars an hour.

Posted on Jun 21, 2009

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Posted on Jan 02, 2017

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Our Bosch SHU43C Built-in Dishwasher sticks in the drying cycle.


I have the same dishwasher and started experiencing the same problem last week. It is now fixed (at least for the moment). Here's what I did first. I checked the drain pan under the machine for water(none), the heater for continuity(okay), the float for binding(none), and the float switch for proper functioning(okay). I tried turning the ckt breaker off for a couple of hours to see if that would reset the control module(no effect). I then dissasembled the front door and removed the control module. I had previously read about the common problem of a cold solder joint on the heater relay pin on the control board. My heater was working and the joint looked good but I resoldered it anyway. I reassembled everything and it worked perfectly! My conclusion is that it was either a cold solder joint that was somehow causing the problem or a connector issue that got resolved during my disassembly/reassembly. Hope this helps.

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If you have a Bosch shu4300...check this site.

http://fixitnow.com/wp/2006/06/09/bosch-dishwasher-takes-forever-to-complete-a-cycle/

My issue was a heater fault and fixed the problem by resoldering a bad joint. Works fine once this was fixed.

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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!

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1 Answer

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go to the bosch site and click on Service. It takes you to the parts where it describes all the parts and numbers

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2 Answers

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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!

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1 Answer

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hi there the low humming noise that you are getting sounds like the fill valve, this could be due to you perhaps not turning the water back on after fitting the new dishwasher or the fill hose being kinked when the dishwasher was put back ,hope this is of some help to you.

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