I think there is a reason
GE installed massive diodes on the circuit boards and quick-blow fuses just over the rated capacity on heating elements on their Twenty-Eight Hundred series dishwashers, adding extra protection for the motor running the detergent dispenser on the "D" version - the last one.
I've read nothing in the ensuing 30+ years to suggest that modern electronics are less sensitive to heat, humidity, corrosive vapors, static discharge, dirt, grease....
In short, Speed Queen has clearly neglected to protect some vulnerable circuit against one of the above - I'm guessing the idiots ran the pump directly off a marginally adequate transistor instead of using a proper solid-state relay or, heaven's above, a mechanical relay.
So - until they bite the bullet and accept their design failure, this machine is a very expensive piece of junk.
Good luck - I'd make noise everywhere possible until they cave and refund your money.
Use it to buy a mechanical Speed Queen. They're good.