I have an attic fan wired to a thermostat that I'd like to come on whenever it's hot enough. The problem is, the fan is wired to a circuit that's operated by the light switch for the stairs into the attic, which also controls the light at the top of the stairs, as well as a pull-chain light in the attic. I don't want to have to leave the light at the top of the stairs on to get the fan to run! I also don't want to convert that light to a pull-chain light, since it's the only light in the stairs, and at the top. There's another switch installed just before the fan, apparently for code purposes, but it doesn't make much sense to me to only have the fan live when the wall switch in the stairs (and cosequently the light) is on.
Is there an easy way to convert the switched-hot attic fan to always-hot, while keeping the two light fixtures between the fan and the switch as switched-hot? I say always-hot, but I would leave the final switch operating the attic fan only in case of emergency.