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Hello all, I am hoping I may get some direction on how to proceed. I have a Bosch SMU4056; and

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  #1 (permalink)  
Old 06-30-2009, 10:52 AM
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Default Dishwasher unresponsive
Model Number: SMU4056   Brand: Bosch   Age: More than 10 years   

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Hello all,

I am hoping I may get some direction on how to proceed.

I have a Bosch SMU4056; and until recently, it has been a great performer.

The washer was working great and then one day it just stopped in the middle of the wash cycle.

If I cycle through the different cycles it does nothing. There is no sound, no pump noise. Nothing.

I used a shopvac to get the water out of the unit.

I am not sure how to proceed to troubleshoot the unit. I have not been able to find much of anything on the internet for test procedures.

Any direction and help woul dbe greatly appreciated.

Thank you in advance,

Randy


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  #2 (permalink)  
Old 06-30-2009, 06:09 PM
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Hi Randy,

The first thing I would do is check for 120 VAC to the dishwasher.

Remove the toe panel and check the power cord connection to the dishwasher for burned wires and/or lose connections.

Remove the outer door panel and check all wires inside the door.

Check the "on-off" and the door switches.

Here are the breakdown diagrams and Replacement parts for BOSCH SMU4056 UC/09 (FD 7307-7902) | AppliancePartsPros.com

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Old 06-30-2009, 07:00 PM
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I will verify the voltage when I get home tonight. I had the thing apart last night but had no clue where to check, and what to check.

I'll start with the voltage and wires.

Thank you for your help!
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Old 06-30-2009, 07:03 PM
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You are welcome. Keep us posted.

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Old 06-30-2009, 10:26 PM
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I checked the incoming line and the power coming is 110v; so that is good.

I checked the voltage at the lines coming in to the Selector Switch Assembly and the voltage is still good. From there, I am not too sure what voltages should be - and where.

The odd thing, and I don't know if this is norl - I cannot remember - is that then the door is opened and the on/off switch is depressed the light comes on (for behind the on/off switch) but once the door is closed - the light goes out. Very odd.

I noticed that the motor for the timer unit is not turning. From what I can gather it is not getting power (?)

I did not get a chance to yank the unit out from under the counter top. That will be tomorrow.

The I guess I can check the other components.
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