Hey AEK, first of all let me say that you really always need exhaust and always need airflow in the tent. What I can tell from your description is that your blades are disconnected from your motor. That's probably because of the "made in china" aspect of these kinds of equipment. I dont know if you bought a "tent kit" but usually the fans they give you in those "package deals" are complete trash. Sorry about that man ! You have two choices : you can macguiver the thing, take it apart, remove the screws at the back then open up the cage then remove the blade and reattach it to the motor, or you can buy a new cheap fan ... make sure these dont fall or otherwise get damaged, as you know they are flimsy so... Hope this helps my friend 🚀