That motor is smoked. I did the same thing. Bad solder joint and it came off the track at 300 degrees with smoke pouring out of it. At some point it is going to fail if it hasn't already demagnetized.

Neu will replace the motor, but it will not be under warranty as the failure was caused by something other than workmanship of the motor. They have a good replacement program though. 50% off any new motor of your choice.