KitchenAid DW Lower Wash Arm Not Spinning

[amappliancewi@gmail.com]

I have a KitchenAid DW; Model # KDTM404ESS3; Serial # F94360128. Manufactured in 2019. In the beginning, the dishwasher was washing poorly and it appeared the lower spray arm was not moving. Water was being sprayed out of the lower washarm. I also noticed the diverter motor moving as I had marked the plastic cap on the inside of the dishwasher to keep track. Because of that, I replaced the washarm but that did not solve the issue. I then returned to replace the diverter motor. At first it leaked water through the diverter motor shaft so I reinstalled with more application of the sealant. Then there were no leaks and the wash arm worked and dishes washed well again. 2+ months later the washarm is not moving again and dishes are poorly washed. Currently water is not dripping down as it did for me when I initially installed it. I will continue to monitor that.

Would you recommend another diverter motor install paying special attention to O-ring and sealant? I know some techs replace the whole pump/motor assembly. Is this the best next step?

[bzserviceco]

  WE also have  KDTM404ESS3 ,   its doing the same thing,  any help would be greatly appreciated,  Tried to remove the innards and it seemed rather difficult.

[MrApplianceMatt]

The diverter seal is bonded to the sump assembly and as such the only correct way to repair it is to replace the sump/motor assembly. Whirlpool had a run of bad wash motors 2-3 years ago and a pretty decent failure rate. We don't quote the sump pieces separately. If the wash pump or diverter fail we replace the whole thing. Best way to ensure you don't get a callback. That being said, have you run diagnostics on the machine and retrieved error codes to find out what the machine thinks is wrong?