I'm still scratching my head trying to figure this one out. I have a motion detection light outdoors on the back deck, just off the living room, the switch is just inside the door. The living room also has a ceiling fan on the same circuit. The ceiling fan switch is on the other side of the room.
When I change settings on the ceiling fan it toggles the motion detector light off or on.
I would guess that the CF switch is somehow interrupting the power to the rest of the circuit briefly, enough time to act as if the outside lights switch were toggled off then on.
Does it sound like a defective fan switch? Outside fixture is new.
Thanks, Mike