1. Remove the hopper and the base plate.
2. Motor jog the filling motor all the way forward.
3. Look to see if you can see the orange light on the sensor behind the filling motor plate. It may need to be replaced.
4. If you can see the light use a vacuum with the vacuum attachment to clean it out.
5. Press "stop" and "reset"
6. Do a test run to see if it is working.