Answer to: Why fan is making loud noise when it rotatesClean the dust of the blades. When dust build up on top the blades gets thick, it can throw off the balance. This makes something rub when it gets spinning fast. You may also notice a slight wobble when the fan is running. I know this can happen. This happened to me. It only made noise on high speed. After cleaning the blades, the wobble and ticking noise stopped.