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!