Originally Posted by steverad
I couldn't open the vent & noticed that one of the vent operators had broken rivets and it was lose. So I took hehr fan assembly & the cap out. The fan motor is ok. I removed all the rivets & clean the vent operators, but they don't move at all. I can remove the handle, but nothing else move. I also removed a rivet / cap at the bottom of the operator to see what is wrong, yet can't figure out anything, how do they operate? I know I can buy new reproductions units. Any advice or comment is appreciated.
Those old operators, when not used very often, had a tendancy to seize.
All you can do is remove them, and soak them in WD-40 for a few days.
Then, try your luck again.