Great post, thank you... We live in an age of vast dissemination of information, making everyone an expert in everything. I am assuming there is a hall effect sensor to ensure the drum is rotating as after pressing start, there is an audible click for the motor relay closing and if the drum does not rotate, there is couple of second delay before the code is thrown. Clearly on my gas Duet this was arcing awhile at the relay solder because of the scorching on the plastic housing and pcb. I cleaned up the trace and post with a brass brush, dab of flux, soldered it back up, checked continuity and drying clothes again.