I installed a ceiling fan with a light fixture in place of a light fixture and ran an extra wire from the ceiling fan to the switch. Would now like to install a dual switch to control fan and light independently. I have 4 wires at the switch now and am not sure how to connect two of the wires to the new switch.
I have a red wire to the fan and I know this goes to the fan wire on the new switch. I have another red that is traveling both up to the fixture and down to an outlet or another switch, I believe. I think this is the hot wire as it was connected to the common screw on the single switch.
I also have two purple wires going to the switch one connected to the top right and one to bottom left, both of which are heading up in the conduit. I know that the wiring goes to a smoke detector before arriving at the ceiling fan/light fixture, if this is important.
There are two white wires traveling through the box. I believe those are neutral. I'd appreciate some insight. Can this switch be installed here? And if so, where do I connect the purple wires?