It sounds like you may have a blockage in the tube, causing the motor to overheat and shut down. That's what caused mine to do this, anyway. If it's in the "main" tube you might be able to clear it by running a heavy ball-bearing through, but if it's in the little six-inch "stub" in the head (as mine is) then we have the same problem... I'm searching for a diagram of how to get into that to clear it. Good luck.
Peet McKimmie, January 2009
