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FIXED WDT780SAEM1 - Whirlpool Gold Dishwasher not completing cycle

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Daniel Moran

Premium Member
Joined
Mar 24, 2021
Messages
5
Location
Duvall, WA
Model Number
WDT780SAEM1
Brand
Whirlpool
Age
1-5 years
Hi,

I have had this WDT780SAEM1 Whirlpool Gold dishwasher for almost 5 years now, and it has been great, up until the last few months. It has seemed to not fully run through a cycle - there would be soap suds at the bottom (inside, below the lower basket), and about half way thorugh a cycle i would sometimes come and check and hear nothing happening at all, except a clicking sound. Or a click and it would start again for a couple of seconds then stop. Sometimes I would open it, press start again and it would help it run for more than the 2 secs. There would still seem to be soap or film on the dishes and a lot would not be fully clean. I have been using different types of soap from gel to individual block-packets, and I have made sure there is jet dry in that compartment, and I have had the same issues. However when using the soap blocks I found they would often still be sitting in the base of the machine when it was 'finished' it's cycle. I have also been trying the sensor setting, with the same results.

We've now stopped using it and my wife is growing impatient with my self-fix. I've tried flipping the breaker with no change. I have made sure there is hot water coming to the sink before running it.

Unfortunately I've been unable to figure out the error codes, or how to see them. There is no external display on this model, which makes things difficult since you need to open the door to see the codes. I tried pressing three buttons in a 1-2-3, 1-2-3, 1-2-3 format, which then made every light on the display light up. I have tried pressing start and closing the door. If i opened it again after 5 seconds it would say either F7, E1 or would flash F-, E-. I see that F7, E1 is the heating element, but during the longer diagnostic mode I have found the element to be hot at the end and sizzle when i poured water on it. When I tried to just let the diagnostic mode run, at the 14min mark there was a beep. But when I opened the door, all the lights were off and there was no code (this is when I tried cold water on the heating element). I have also left it for the full 23mins that another thread indicated was the time needed, there was no lights and no code.

Could someone please give me directions on how to properly determine the error codes?

From looking through past threads it seems like I need to order and install a new pump+motor, part # AP6023350/WPW10605057. Unfortunately I don't have a volt meter to check that the required volts are going to the pump/motor.

Any help is GREATLY appreciated!

Thanks,
Daniel
 

Jake

Appliance Tech - Admin
Staff member
Joined
Aug 24, 2004
Messages
125,367
Location
McMullen Valley, Arizona
Hi Daniel,

Yes, your reading the error code properly. The way these dishwashers heat water is the wash motor has to spray water over the heating element, thus the water heats up. If the wash motor is faulty then it can't spray any water over the heating element, thus you get error code 7-1.

Yes, that is the part you will need. I had 2 in Sept. 2018 in Parker, Arizona that did the exact same thing, and the new complete motor/sump assembly fixed them both.:)

Here's the complete motor/sump assembly for your model:
WPW10605057 PUMP&MOTOR


Do you know how to replace it?

Jake
 

Daniel Moran

Premium Member
Joined
Mar 24, 2021
Messages
5
Location
Duvall, WA
Hi Jake,

Thanks for your quick response.

No, I have not replaced anything in the dishwasher before, but I recall a how-to video that I think you posted in another thread - I think I'll attempt it myself, as I think it was the one where you just remove the front panel.

But before I order the part, I just wanted to confirm that even though the error code 7-1, since the element IS in fact heating up, it means that the element doesn't need replacing?

Also, I think there are two different links for that part and they seem to be at a similar price. Do you know if one is more preferable or faster in delivery than the other?

Many thanks,
Daniel
 

Jake

Appliance Tech - Admin
Staff member
Joined
Aug 24, 2004
Messages
125,367
Location
McMullen Valley, Arizona
But before I order the part, I just wanted to confirm that even though the error code 7-1, since the element IS in fact heating up, it means that the element doesn't need replacing?
That is correct, the error code 7-1 is because the water is not getting hot, because the wash motor is not running, thus not spraying water over the heating element.

Also, I think there are two different links for that part and they seem to be at a similar price. Do you know if one is more preferable or faster in delivery than the other?
This one Daniel:
WPW10605057 PUMP&MOTOR


Jake
 

Daniel Moran

Premium Member
Joined
Mar 24, 2021
Messages
5
Location
Duvall, WA
Hi Jake,

Thanks again. I've ordered the part. Just wanted to check if this is the instructional video that should work with my model as well:


Daniel
 

Jake

Appliance Tech - Admin
Staff member
Joined
Aug 24, 2004
Messages
125,367
Location
McMullen Valley, Arizona
Yes Daniel, that video should be almost the same as your model.

Keep us posted.

Jake
 

Daniel Moran

Premium Member
Joined
Mar 24, 2021
Messages
5
Location
Duvall, WA
Many Thanks to Jake for your guidance. I can happily say that this part and the repair went perfectly and the dishwasher is working like it did when first bought!!

The video replacement instructions were excellent and it was nice to only remove the door cover and leave the dishwasher in place.

The video was almost completely accurate - in my repair there was one or two additional wire clips to unplug and plug in, and one was tighter/harder to remove than in the video, but worked. Also, in my original dishwasher and part, there is a large(3/4" thick, i think) ceramic or stone base that covered most of the large part and was attached to the bottom so would sit on or just above the floor. There was not one on the replacement part, so I just removed it and put it on the new one before installing.

All in all, I saved the money and time of calling a repair technician for a straight swap, and it was not a difficult repair/replacement for me and I'm not very handy or repair-savvy. For me it was challenging enough to feel like an accomplishment, but this is really something that anyone can do.
 

Jake

Appliance Tech - Admin
Staff member
Joined
Aug 24, 2004
Messages
125,367
Location
McMullen Valley, Arizona
Excellent Daniel, glad to hear the new PUMP&MOTOR assembly fixed it.(y)

Thanks for the update and the added information per your model!

Jake
 
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