I had the same problem. Was with a James hoover at work...5 blocks of stairs with a hoover that only wants to work 10 seconds on, 30 seconds off.
The only thing I can think of is it might be over heating? My boss said lose wiring but you can just leave it there and it turns itself on and off constantly. Also, moving the wires has no effect. And it always seems to work the longest when I first start it up.
Please can someone confirm or correct me?
Mr. Cleaner
August 2008