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Bosch dishwasher SHY56a02uc/14


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6 replies to this topic

#1 somerspoint

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Posted 16 April 2015 - 01:23 PM

I'm new to the appliance repair game and need some help diagnosing a bosch dishwasher that has no power. Model number is  SHY56a02uc/14. I checked the junction box and I'm getting 120 VAC. What should I look for next. How can I test the Power-On/off switch and door lock switch. Im having trouble understanding the wire diagram. Please help 

 



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#2 Samurai Appliance Repair Man

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Posted Yesterday, 07:52 AM

Use a loading meter to check voltage at the power junction so you don't get fooled by an open neutral.  If that checks good, then use the same meter to check for voltage clear up to the board.  If those check good, then replace the main control board.

 

Part number: 00431692

Part number: 00431692

 

Loading meter: https://www.amazon.c...ASIN=B003NY45QK

 

Some goodies from the Downloads section:

 

Bosch 2008 Dishwasher Training Manual 

 

Bosch Thermador SHE Dishwasher Service Manual 

 

Bosch SHU Dishwasher Service Manual 

 

 

 

 

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#3 somerspoint

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Posted Yesterday, 09:48 AM

Ok thank you. One more question. If i do get voltage to the board what would be the problem then? could it be the power switch is bad? How would i check that?



#4 Samurai Appliance Repair Man

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Posted Yesterday, 10:28 AM

If you DO get voltage to the board, and the board doesn't light up or respond to the touchpad, then the board is bad.

If you DO NOT get voltage to the board, then either the power switch or the supply are bad.

#5 somerspoint

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Posted Yesterday, 07:49 PM

Thank you for the valuable information.It was very helpful. Turned out the problem was at the junction box. Apparently I didn't measure the voltage correctly. When I checked again, I was only getting 55 VAC from L1 to Neutral. Traced the line to a garbage disposal which was on the same circuit as the dishwasher. I was losing my neutral to the dishwasher. Haven't pulled the machine out yet but i'm certain I'll find the break in that line somewhere. THANK AGAIN



#6 DanInKansas

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Posted Today, 10:26 PM

There ya go!  There are an awful lot of guys who would have thrown a board at it and then wondered why nothing was working.


What is the simplest, dumbest explanation? Because that's the most probable one. 


#7 Samurai Appliance Repair Man

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Posted Today, 10:49 PM

Good catch, Sommers. That's why I always use a loading meter to test power supplies

Use a loading meter to check voltage at the power junction so you don't get fooled by an open neutral.






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