Quote Originally Posted by jhovel View Post
A centrifugal fan (whic is what this is) CANNOT blow or suck in reverese. So I don't understaand the original statement. A centrifugal fran running the wrong way will still suck through the middle of the rotor and blow on the outside of the rotor. However it will be very inefficient, becasue the air can only escape in a rirection opposite the vortex it is soinning in - but it will still escape and the fan will therefore still blow out of the open end of the scroll....

Thanks Joe

We have already decided that it was just my stupidity and ignorance that was the problem and not the fan. No need to rub it in.