I have a Whitfield Optima 3. When I turn on the stove the auger makes a quarter turn and then quits. I have taken apart the motor from the auger. I removed the auger and cleaned out the shaft. The auger moves freely in the shaft. I also had older motor that I replaced a couple of years ago, that worked when I replaced. It is doing the same thing makes a quarter turn and then quits. I have also have the motor disconnected from the auger and still not working. Any suggestions on what to look at next. Thanks, Tyler