It is in "normal service"...usually run once or twice a week for the past 11 years.
Okay good, the reason I ask is if sometimes a dishwasher isn't used for a month or so (like a vacant apartment) the motor will seize up but that is not the problem here. Yes it is possible that something has jammed the motor. I am sending you a link to a video that will tell you how to take apart the dishwasher for cleaning and checking for debris. If all that turns out okay and your dishwasher is still doing the same thing then you will need to replace the motor. Very easy job to do and the motor is held in only by one bolt. I am here for further assistance and thank you for your time and patience, Randy.
Thanks for the assist!
I really can't tell from the parts drawing what drives that chopper blade (6)...if it's the pump motor, I assume that something wedged in that space around the blade could stall the motor...
Off to find a Torx T-15!