I've been putting fans on dimmers for a long time, but today, when the fan was put on a dimmer, the motor of the fan was very noticably loud. On a regular switch, the motor was quiet again. I figured the dimming switch might had gone bad, as it was already in use prior. So I tried it on another, though still in use, and same problem. I bought a new lutron dimming switch, and still the same problem. It's just a fan/light combo with the light on a seperate switch and the fan on a dimmer switch. Anyone ever heard of this? or know a possible cause?