I have three 20+ year old Casablanca fans. One makes a knocking/thumping noise at the same point in each revolution - go around, thump . . . around, thump . . . around, thump.
It's been doing this off and on for 5 years. Recently it has become louder and persistent. The Casablanca Fan Company are a customer unfriendly bunch. I call them to ask what causes this and how I can fix it. They offer to locate a "certified" Casablanca repair service near me.
[Off topic rant: The speed control circuit board in another failed. This is two customer unfriendly outfits in a row. About a month ago I called InSinkErator about my garbage disposer and got the same 'Get lost. We're only interested if we can get more money out of you' reply. Given the ridiculously high price and low reliability of their fans combined with their customer non-support attitude, they've guaranteed I'll never buy another Casablanca fan.]A few years ago an acquaintance said it has something to do with the flywheel needing to be repositioned, or something like that. Anybody know how I can fix this?
jim ___ Have a home upkeep question? Try my help page. It's sort of an alt.home.repair FAQ.