Hi everyone. I'm new to the forum. Just bought a 1999 Beaver Patriot Brandywine. There is a vent fan under the upper cabinets directly behind the passenger seat that runs continuously. Can someone tell me what that vent is for and how do I turn it off? I know it has to be depleting my coach batteries, but I can't figure it out. I've located two rocker hi and low switches for the Hurricane heater in kitchen and bedroom, and they are off. Thanks!