All of a sudden the machine just stopped working. No nothing. The light is still on so its getting juice, but nothing happens when you press the pedal. Pedal seems to be working fine, blowing air as it should. When fully depressed, motor makes no noise at all. I can fix whatever is broken, just gotta figure out what it is -- and hopefully without buying the wrong part too many times. I was thinking it could be the air transducer, but that's just a wild guess. Any ideas how to id the culprit for sure?