We just purchased a 2012 408 Loft. The dealership could not tell us what one of the light switches is for. As you're standing in the patio doorway, in the hallway to the right is the thermostat and a light switch. The light switch didn't appear to operate anything. Does anyone know what it is for? Any other tips and tricks that we should know about for our 408 Loft? I'm nervous about having it winterized properly, also. So many extras in it. Thanks for your help.