Finished the game.
Nice & entertaining... congrats!
Spoiler
Yes, the fan was placed with the 3 wheels and I could not progress... as far as I remember, it only worked out when I moved one lifesaver onto the top right wheel slot. (so you may please test again without any lifesaver on the top right wheel) However, it could be that I noticed another similar effect within the organ room: There we do have two windows, oposite to each other, and on the right one it was impossible to place the table ramp, it only worked on the left one.
[close]
Nice & entertaining... congrats!