you need the charchole ash tray door open and the hopper door uop open than arfter 10 minits iif charchole is going well you csan trell by transparent smoke that is when you close both the ashtray door and top door of the charchole chimdy ie hoper door closed

fanshuts of if any of the things are open ie asktray door or top of hopper or the lid of the grill you see 3 buttons thare safty buttons that when closed the fan works when eather hopper or ashtray doors or the bbq lid is open the fan dfont run when closed the fan runs \