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SHY56A05UC/14 water pressure and heatrer problem


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7 replies to this topic

#1 phughes200

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Posted 22 August 2014 - 06:16 PM

My Bosch Dishwasher SHy56A05UC/14 suddenly has no wash pressure from the circulation pump.  When the water is sent to the lower arms, the arm rotates and the water shoots up about 6-8 inches. When the water is sent to the upper arm, the arm does not rotate and water barely comes out.

 

I was hoping to preemptively order some parts for this before doing the major exploritory dismantle. Stuff I know so far:

 

• very little pressure/flow from the circulation system.

• Reached into circulation pump inlet and found no blockages

•  water heater had been working in the past, not coming on now, but I assume that is from the circulation flow switch not activating do to low flow? Is that true? 

 

My guesses at this point without dismantaling and actualy looking at the thing are: 

 

Missing/broken impeller vanes?

Some kind of blockage between the pump and the outlet.  Is it possible to have a blockage there, it seems like it is just the heater module and pretty wide open space.

 

thoughts?

 

Thanks!!



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#2 Scottthewolf

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Posted 22 August 2014 - 07:25 PM

Did you try running it without the filter in  the sump to see if maybe your sump filter is clogged?


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#3 phughes200

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Posted 22 August 2014 - 08:50 PM

Made a VERY minor change in flow. Barely noticeable. Filter was clean.

 

Will low flow cause to heater to sop working? I know there is a flow senor. I just don't know if it has a set threshold of required flow or if it just looks for any flow.



#4 Budget Appliance Repair

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Posted 23 August 2014 - 06:48 AM

Has to be a certain flow, (I don't know how much that is though), it has to overcome the pressure switch inside the heater housing.

 

I've seen the wash motor impellers separate and cause a low to no flow with the motor running.

 

If I remember correctly it's either a 7mm or 8mm nut/stub on the end of the wash impeller, you should be able to reach in and turn the impeller and feel if it is turning really free or you feel resistance and it seems to be turning the motor or not.


William Burk (Willie)
Willie's Budget Appliance Repair
Eureka, CA 95501

#5 phughes200

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Posted 23 August 2014 - 03:30 PM

Thanks. I am unclear where exactly is the nut you are referring to. Can it be access through the inside of the tub?



#6 Budget Appliance Repair

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Posted 24 August 2014 - 06:51 AM

Take the large strainer and fine strainer grate out and from inside dishwasher directly down inlet to pump impeller, (the said nut is actually molded in plastic as the front of the wash impeller).

 

Part number: 00167085

Part number: 00167085

 

bosch-circulation-pump-repair-167085-ap2


William Burk (Willie)
Willie's Budget Appliance Repair
Eureka, CA 95501

#7 phughes200

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Posted 24 August 2014 - 01:18 PM

Thanks.



#8 phughes200

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Posted 30 August 2014 - 05:19 PM

Fixed. Impeller was shot. The heater now works. Thanks.






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