Probably for measuring the RPM of the fan.
Dave
----- Original Message -----
> The fan arrived, it is hooked up and running, moves a bunch of air.
> I have a question. There are three wires, red 22 Ga, blue 22 Ga, and
> a much smaller white wire. What is the white wire for? Ran the red
> to the red feed, Blue to the switch and covered the white wire up.
>
> Royce
>