WDT790SAYM3 fills but does not run

May 14, 2019
Orlando, FL
Model Number
1-5 years
I have a Whirlpool Gold WDT790SAYM3 that's stopped running a few days ago. When I start a normal cycle w\ high heat it fills for about 30 seconds, then over the next few minutes I hear a few clicks and whirring noises but the motor never kicks in to wash the dishes. After a while it will drain the water and refill, followed by more clicks and whirs. Along the way the detergent dispenser door opens (but nothing else happens). If I let it run through what would be a normal cycle this repeats a few times and the control panel lights up to indicate the wash is complete. Outside of not actually washing the dishes all display lights and timings are consistent with a wash cycle running.

I ran the 1-2-3, 1-2-3, 1-2-3 diagnostic cycle (several times over the last few days!) and the final error code each time is 6-4 - Float Switch Open. When this first started I could nurse it along, getting the wash motor to kick in with a combination of unplugging for a while, running the diagnostic, restarting a cycle, and/or opening and closing the door mid-cycle. Now the wash motor will not start at all. I want to say when this began the wash motor would run briefly during the diagnostic; now the wash motor doesn't run at all.

Does this really sound like a problem with the float switch? Or should I be looking for something else to tell me what's going on?


Appliance Tech - Admin
Staff member
Aug 24, 2004
McMullen Valley, Arizona

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:

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.