Question about Dishwashers

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Model No.SGS43A52 DISHWASHER About 3-yr old.

Was working perfectly - no problems. Stopped - no power, it would seem. Checked fuse at at wall - OK. No Blockage in water line or filter and water supply is fine.

Is there some switch in the machine that could have tripped?

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  • At sea Feb 24, 2008

    Model No.SGS43A52 DISHWASHER About 3-yr old.

    Thank you for taking the time to respond. The problem appears to be the control unit/ programmer. Power is actually getting as far as the unit but no lights come on and nothing works. Can this unit be repaired - even to leave one program working as that is all that is used normally? (Some staining on cover indicating burning inside).
    - a replacement unit is about 40-50% of the cost of a new machine!!

  • sdhull Mar 22, 2009

    I have this same issue.  My model is SHU33....  I figured it *must* be the control unit (though I didn't see any burning, as you mentioned).  The unit simply stopped one day near the end of a cycle (didn't finish draining).

    I have a circuit tester that beeps when it detects current.  I checked that when I hit the power switch, electricity is sent all over through the rest of the door panel.  But no sounds, no lights, no action.  I figured that the control unit was bad so I ordered a new one (it was very hard to find).

    But when I connected it and hit the power switch, still no action!! Dang!  So what am I missing?

  • Duncan Brooks
    Duncan Brooks Jan 05, 2014

    Hi, I am having this same problem. I have checked for current all through the door switches and it gets to the control panel. I am wondering if there is a thermal fuse or switch in the machine, that has tripped? @At sea and @sdhull Did either of you figure out what had happened?

  • Anonymous Mar 29, 2014

    Dishwasher will not start.....checked power and water supply....

  • Anonymous Mar 30, 2014

    Bosch dishwasher model SMS50E12AU stopped working part way into "Normal" cycle. Have checked power and water supply as well as filters including water supply hose.

  • Anonymous Mar 31, 2014

    fitted a new dishwasher and it won't work, check power/water supply and all ok


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Check fuse in plug top,if its not that it could be door switch 30 years repairing. Close Ire....

Posted on Feb 23, 2008

  • eamonn close Feb 24, 2008

    If it is burning in timer unit you smell it I still think it could be the DOOR SWITCH it would be like trying to work the machine with the door open Close Ire.good luck


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Usually in these it is the wire connections to the machine. turn the breaker off, then take the toe kick off behind the toe kick right side is the terminal box take the cover off, and check for a poor connection most times it pretty obvious. this is usually just caused because of a poor connection when the unit was installed. If there damaged just clean them up and reconnect then check machine

Posted on Feb 23, 2008

  • Tommy Stebbins Feb 26, 2008

    Well there is no real way to repair the control module, don't know where you would get a schemaqtic of the control itself. Not sure which specific model you are refering to either missing the engineering code should have like UC/12 or somethingthing at the end of the model. But if you are sure it is the Electronic control board and the machine is under 5 years of age it carries a part warranty from the manufactuer, but you have to use an authorized service provider for that. A look at the control prices straight from Bosch for this series only run 85.00-100.00 for the control itself go to this link you will have to get the remaing numbers for your D/W to find the correct control

  • Tommy Stebbins Feb 26, 2008

    from that link go to service then quickfinder then enter your model number


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