We are new to the Big Horn and love it. Question - The vent fan in the ceiling near the door has a manual and automatic position on the knob for opening and closing, plus an off/on switch. We had never used it, but recently the vent opened and the fan started on it's own. It look like it might rain, so I pull the knob to manual and turned off the fan and closed the vent. During the night I heard the motor start up, the vent did not open, nor did the fan come on. I switched to auto and vent opened and the fan came on. I used manual to stop it and close vent again. I did not get instructions on how this vent/fan works. Since it is high up on the ceiling, I can barely reach it by standing on the stairs to the bathroom. I guess I better get small a ladder. Is there a switch some where else for this fan? Not very convenient like this. Can someone tell me how to used this vent/fan?