Re: Mystery switch
It's common for electricians to install two switches leading to a ceiling box where a fan *could* be installed: one switch for the fan, the other for the light-on-the-fan.
It's also common to hook up only one of these switches to a fan/light combination (where the kit has a remote), leaving the other switch unused.
When you took down the light and put up the fan, did you perchance see a red wire in the box capped off with a wire nut but connected to nothing? If so, this probably comes from the mystery switch.
The "Senior Member" designation under my name doesn't mean I know a lot, it just means I talk a lot.I've been a DIYer since I was 12 (thanks, Dad!). I have read several books on various home improvement topics. I do not have any current code books I can refer to. I was an apprentice plumber for two years.