How To Replace Bathroom Fan Light Combo Ideas. Now i am thinking that if i want independent control of light and the switch (ultimately tied to automation), i would have to replace the 12/2 with a 12/3. Turn the switch on and the shower light and fan turn on.

How to replace bathroom fan light combo. The 70cfm may just be enough to keep the air in your bathroom fully conditioned. Several intermediate steps for each of these items are discussed in this article.