I want to replace a bath fan with one that has an automatic humidstat.
To do this, the fan requires three wires - white, black, and red. This
will allow the fan to be turned on manual or automatically. I only
have a white and black with the current fan. I need the red wire. Can
I:

Just run a third single red wire

or

Do I need to feed a separate three wire set to the fan (take out old
two wire)

Thanks

You must run all the circuit conductors together, so it's probably easiest
to remove the two wire cable and run a three wire up from the switch



wrote in message
ups.com...
I want to replace a bath fan with one that has an automatic humidstat.
To do this, the fan requires three wires - white, black, and red. This
will allow the fan to be turned on manual or automatically. I only
have a white and black with the current fan. I need the red wire. Can
I:

Just run a third single red wire

or

Do I need to feed a separate three wire set to the fan (take out old
two wire)

Thanks