FIXED WDT780SAEM1 Poor Wash

3mta3

Premium Member
Joined
Apr 10, 2019
Messages
3
Location
Melbourne, FL
Model
WDT780SAEM1
Brand
Whirlpool
Age
1-5 years
Noted poor wash, noted cold/cool water. Suspect heating issues. Ran diagnostic got 7-1 code which indicates heating issues. I have watched the video about the thermostat replacement on another thread, and just wondering what do I check? Continuity, so basically if I get a beep from my multi-meter it's good?

Also it looks like the connections to the actual heating coil are way in the back, but I don't think that is the issue. After running the dianostic mode, which also clears the error codes, the unit heated fine. I thought it was fixed, until once again on the following wash, no joy. The detergent tab never disolved and the dishes were still dirty.

Would love to try to fix this thing if anyone has any advice on my next steps, I currently have it running another test cycle.

Thanks

jw
 

Jake

Appliance Tech - Admin
Staff member
Joined
Aug 24, 2004
Messages
99,318
Location
McMullen Valley, Arizona
Hi jw,

Yes, It's most likely a bad wash motor, this has become a common problem as of late, many members here have reported the same. In fact I had 2 this past Sept. 2018 in Parker, Arizona that did the exact same thing, and the new wash motor fixed them both.:)

Look at post #7 here: FIXED 665.13472N411 What to check on why it only washes about 5% of the cycle.

I'd first check to see if your getting 120 volts to the wash motor when it should be in the wash cycle. His Kenmore 665 is made by Whirlpool, and uses the exact same wash motor yours does.

Take the wire connector off the wash motor and use your multimeter to see if yours is getting 120 volts when it should be washing, if so and it's not running order the wash motor below.

Here is the wash motor assembly you can order:
W11032770 Motor-Pump


Here's the video to replace it: Dishwasher Circulation Pump Replacement Video

For a little less money you can order the complete assembly which comes with the wash motor already installed for you along with a new diverter motor too:
Pump and Motor Assembly WPW10605057


Let us know what you find.

Jake
 

3mta3

Premium Member
Joined
Apr 10, 2019
Messages
3
Location
Melbourne, FL
I assume it was the lead to the motor, as I can see the smaller motor (diverter?) which has two leads running to it, further to the rear. If so, it definitely has power. I couldn't get a exact reading as I kept getting nice shocks trying to put my meter on it (funny right), so it has power. I ran other cycle and can hear something running, water is definitely filling/draining. At the times I think it should be "washing", I can hear a clicking sound, but nothing else. So, I think I'm going to order the pump and motor assembly, as you said it's actually cheaper than just the pump. I guess if this fails I can just keep the part and buy the same model (its actually on sale right now at Lowes, but I'm always a try to fix it first person).

Your assembly video is geared towards just replacing the motor, what additional steps do I need to do to, or what is the procedure for replacing the whole assembly?

Thanks.
 

Jake

Appliance Tech - Admin
Staff member
Joined
Aug 24, 2004
Messages
99,318
Location
McMullen Valley, Arizona
Yes, your getting power to the wash motor from the control board, so yes that confirms your wash motor is bad.

Yes, its best to get the complete pump/motor assembly.

Here's the video to replace it: Whirlpool Dishwasher Disassembly Video

Let us know how it goes.:)

Make sure you turn the breaker OFF to your dishwasher before you begin.:)

Jake
 

3mta3

Premium Member
Joined
Apr 10, 2019
Messages
3
Location
Melbourne, FL
Part installed, video was very helpful. Didn't need to remove the dishwasher from cabinet. Ran diagnostic mode with no error codes noted. After several wash cycles, appears to be washing again like new! Jake, thanks for the help!
 

Jake

Appliance Tech - Admin
Staff member
Joined
Aug 24, 2004
Messages
99,318
Location
McMullen Valley, Arizona
Excellent jw, glad to hear the new pump and motor assembly fixed it.:)

Thanks for the update!

Jake
 
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