Ok, I went through the drill again today. I think I was mistaken about the chassis battery powering the house. I connected the house batteries and hit the use button, and the lights worked. I disconnected the batteries, and the lights went off. As for the refrigerator, when the batteries were connected, and the fridge switched to "on", the fridge light came on when I opened the door. I think with the battery disconnect I may have solved my battery drain problem. Thanks to all for your input and insight!