Thank you for the quick reply. It is definitly not a furnace switch, because mt furnace swith is next to my back door right in the vicinty od the furnace. The mystery switch near my front door does not appear to control anything that I can pinpoint. As I mentioned in my original post, it does not co...

I purchased my 1989 shamrock MH 2.5 years ago. The previos owner gave me no imformation about the home and I have had to discover/figure out things on my own. I still have a few mysteries that I have not been able to figure out. One is: next to my front entrace way, I have a set of three electrical ...