I’ve a block of 4 switches in my house. One switch doesn’t work. Like it doesn’t do anything near as I can tell. How to make this a 3 gang? There a thing as a 4 plate cover with a blank? May look silly to me.
Ok so my guess is the one switch went to an outlet in the middle of the icing room floor but I never checked it and I’ve removed the outlet a few years ago.