Almost 4-1/2 years ago, our A&E Weather Pro was stopping every few inches when it was extending or when closing it up. The tech at the dealership hit the forward end of the tube, where the motor is, with a rubber mallet, while I was activating the power switch. After several cycles, while he kept tapping on the tube, it started to run smooth. It has worked ever since then. I was told that the magnets, common to the motor, will stick and cause drag.
The dealership called Dometic to have it replaced under warranty. Dometic said that now that we have freed it we shouldn't have any more problems. I was a bit skeptical, but they were right.
Tom, Pat and Buster (the Boston terrier)
2004 DSDP 3807, 370HP Spartan