Originally Posted by heath423
... How and why does this happen? Does anyone else have an issue with this? ... Help! 2013 26BH
I had a 14" vent in a Dodge van that did the same thing. My theory is that as the vehicle goes down the highway the changes in air pressure flex the vent lid just enough to work the lifting mechanism gears a bit loose. From there the rattling vent lid lifts from air flow over it, or maybe pressure from inside. Either way, it will open itself up.
My solution was to install a cup hook in the vent trim from which I stretched a rubber band over to the crank handle. That worked to hold the crank handle in position. For my van often times I would set the handle so the vent was just slightly open for some air flow.
Were I to want to install a rubber band anchor today I think that I would try one of those Command stick on picture hooks. They seal pretty well to smooth surfaces.