I have a Hunter, exactly the same thing but different name/colour. As Neil says, it fries itself... mine has warped its own casing through running so hot the way we use them professionally

They go through belts very quickly too, and it is a pain replacing them.
But having said that, the machine totally revolutionised my curtain cleaning - gets a shed load of dust/fluff out of them which is great to show the customer in the plastic container
