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Whirlpool Dishwasher Model# WDT790SAYB, Fills and Drains OK, Doesn't Run


22 replies to this topic

#1 AlexM

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Posted 02 May 2013 - 09:55 PM

This newer looking Whirlpool DW fills and drains, but does not circulate water.  I checked connections OK, float switch OK, power supply OK.  While I was waiting for pump to start washing, I was hearing clicking sounds from the main board, possibly relay?  How do you check for power to the motor, do you have to pull the unit from under the cabinet?  Is there a fuse that would be causing this? Does anybody have the tech sheet or service manual for this unit?  Thanks.

 

I struggle with diagnosing Dishwashers...is this common?



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#2 Strathy

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Posted 02 May 2013 - 10:05 PM

Had the same symptom last week on a unit with the same pump assembly.  Ended up being a bad motor.  Changed the pump assembly and all is good.

 

EDIT:  Make sure you check this with the connector connected to the pump.  

 

gallery_55589_30_174351.png


Edited by Strathy, 02 May 2013 - 10:06 PM.

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#3 AlexM

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Posted 02 May 2013 - 10:18 PM

Outstanding wiring diagram!  Very cool how you outlined the area.  This is very useful and I will check for 120vac at the motor connection.  Thanks A Million!



#4 PDuff

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Posted 03 May 2013 - 10:23 AM

The new Whirlpool dishwasher Global Wash System (pretty, a'int it) uses a diverter motor.  Harkens back to days of yore with the Vikings or Askos.  Vaskos.  We'll see how these diverters hold up.



#5 AlexM

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Posted 03 May 2013 - 09:14 PM

What is this that your talking about, is it something that diverts the water from the bottom spray arm up to the center and top?  Do you have any information on this? Thanks.



#6 RegUS_PatOff

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Posted 03 May 2013 - 09:49 PM

Diverter Motor

as mentioned on wiring diagram above

# 10

W1207147-00006.png


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#7 AlexM

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Posted 03 May 2013 - 10:26 PM

are these a common motor to fail?  I realize this is not the issue on this unit.



#8 Chat_in_FL

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Posted 04 May 2013 - 10:16 AM

We'll see how these diverters hold up.

 

This is a great new source for leaks! You'll have to replace the sump (only way to replace the seal), diverter motor, and the now corroded wire harness...


Edited by Chat_in_FL, 04 May 2013 - 10:17 AM.

We, the unwilling, led by the unknowing, are doing the impossible for the ungrateful. We have done so much, for so long, with so little, we are now qualified to do anything with nothing.

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#9 Scottthewolf

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Posted 04 May 2013 - 02:56 PM

Don't forget there is a rework on the one time use hose clamp on these models. WHY did they have to take lessons from Asko on how NOT to build a dishwasher?


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#10 Chat_in_FL

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Posted 04 May 2013 - 04:32 PM

Don't forget there is a rework on the one time use hose clamp on these models.

 

Technical Service Pointer #: W10547922

 

Serial Numbers:

Serial Number Range: F20100000 to F21399999

Concern:

Leak potential between wash motor and sump

Cause:

Outlet hose clamp to sump may not be properly crimped. This is the hose clamp on the sump side of the small hose (pressure side of wash motor).

Correction:

Replace existing outlet Hose Clamp with new service replacement clamp using

Kit # W10548435. Be certain to follow the instructions included with the kit.

 Call 800-442-5708 with model number, serial number, and description of issue for repair authorization.

 If approved, Whirlpool will provide the parts and labor free of charge. Reference all Parts and Labor charges to R31606.


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#11 Samurai Appliance Repair Man

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Posted 05 May 2013 - 09:20 AM

Some info on testing the wash motor in these new dishwashers, courtesy of Brother Chat:  http://appliantology...gws-wash-motor/



#12 AlexM

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Posted 06 May 2013 - 08:49 AM

Great info, does anybody have the service manual so I can put it in diagnostic mode and check for error codes?  Thanks



#13 RegUS_PatOff

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Posted 06 May 2013 - 09:40 AM

http://appliantology...yb-tech-sheets/


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#14 AlexM

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Posted 16 May 2013 - 10:02 PM

OK, I went back to run these test:

 

1. looked underneath for the motor connection to check for 120vac and couldn't actually see what I was doing, so i moved to the board.

2. filled with water and was supposed to be in wash mode and I put my needle leads into the two holes next to P5, (attached pic)

3. Am I in the right holes?

4. I got no voltage at these locations.

 

The one thing I'm clear on, is this: there is for sure a distinctive clicking sound coming from the main board, possibly a relay...I can't help but think this is a board issue...thoughts?

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#15 Strathy

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Posted 16 May 2013 - 10:06 PM

I checked mine right at the motor ... I was hearing clicks from the board and thought the same as you.  But when I checked at the motor (with the connector still connected) I found there was 120 down there, but no motor action.  Yours might be a different problem though.  


Edited by Strathy, 17 May 2013 - 08:58 AM.

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#16 RegUS_PatOff

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Posted 16 May 2013 - 10:12 PM

the wiring diagram (above) shows the Motor connects to P5, with the (2) Light Blue Wires

It also shows a Fuse F8 (soldered?) on the Board, OR a jumper wire W2

and another Fuse F9

If your Board has a blown because of a bad Motor,

a replacement Board may also blow the Fuse


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every day is Down Syndrome Awareness Day
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#17 AlexM

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Posted 17 May 2013 - 08:54 AM

So what your saying is that I might need a new motor assembly and board?



#18 RegUS_PatOff

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Posted 17 May 2013 - 09:00 AM

So what your saying is that I might need a new motor assembly and board?

you'd have to do some more tests


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one of my video productions: “Easter Seals: Walk With Me”

every day is Down Syndrome Awareness Day
"A Child Is Waiting" . Burt Lancaster . Judy Garland . 1962

RegUS_PatOff > www.youtube.com/watch?v=oPAY2LsKVEw

#19 AlexM

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Posted 29 May 2013 - 08:17 PM

Great News!  I installed a new sump assembly, only took about 45 minutes including pulling the unit and reinstalling, works great!  No need for a new board.  Customer is happy and now I know what to do on the next one.

 

Thanks Agian for the Help!

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#20 Samurai Appliance Repair Man

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Posted 29 May 2013 - 09:00 PM

Awesome!  Thanks for posting the outcome and that great photo!   :dude:






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