I recently bought a new XXV and it is up and running however anytime you open the hopper lid and close it the display reads " hopper lid open" after it is shut. Sometimes it takes 15 tries for it to see the hopper lid is shut. I don't see a switch on the lid. I have reached out to my dealer but they weren't much help. Does anyone know what the stove uses to determine the state of the hopper lid? Thank you