Be sure to check your wiring behind the switch. A lot of installers run 3-way wire (12/3 or 14/3) which has black, wire, red and ground. The run red to one part of the fixture and the black to...

Just to close this one out for other searchers. Most likely, the original electrician used a 3-way wire (red, white, black, copper) to handle the fan unit. They all share white/ground, while the...