Sorry Jim...... I can't help on this one. That is one problem that I have not had yet
If you have a DVM along with you, I would start by checking the voltages on the motor drive. That should tell you if your problem is only mechanical or electrical. If it is a screw drive, I would think that you should be able to remove the motor drive and again see if there is binding, (freeze in the motor, or a jam in the screw mechanism).
Also, I think your seat is a Villa (or is it Flex-Steel), and with my Dynasty, I needed to talk to Villa several times, and while they were not good at returning phone calls, if I could get to the guy that I needed to talk to, they were good about running me through the diagnosis of some problems. A path through the OEM might be faster and better than through Entegra CS.
I feel for you (my coach is still in the shop) !!
Gary