We have a 2011 North Country 29RKS trailer. In the bathroom we have a switch, that looks like a light switch, but it is not. (We have a switch box for the fan & ights. We have the control monitor.) This switch is a white box and red switch, that is mounted to the left of the control box. No label on it. Nothing in our owners manuals. Does it control/switch the heating system to/from electric to our propane? Help. Thanks!