The fan motor and fan blade assembly ride on a shaftâ?¦that shaft rides on bearings or bushings. It sounds like a few drops of lube in the right spots will get it back to â??rightâ?ť.
If you can access those spotsâ?¦.lube emâ??.
I use tri-flow Teflonâ?¦..no WD40 thoughâ?¦..itâ??s death to things electrical.

HMR