Did you just clean the fan? If while cleaning, you bent a fan blade, even a hair it will shake. Blades are perfectly balanced. Moving one just a hair, will cause the fan to shake. Trying to re=balance the blade(s) is futile, you can get it close, but it will take somr patience. If the fan has built up dust on the blade(s) will begin to shake if some blew off unevenly
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Did you just clean the fan? If while cleaning, you bent a fan blade, even a hair it will shake. Blades are perfectly balanced. Moving one just a hair, will cause the fan to shake. Trying to re=balance the blade(s) is futile, you can get it close, but it will take somr patience. If the fan has built up dust on the blade(s) will begin to shake if some blew off unevenly