You may want to remove the fan motor, disassemble it, clean it completely and relube it with white lithium grease and reassemble it. It will be good as new.

I've done this with my 240 fan motor.

Most if not all are bolted together. They can be disassembled easily, cleaned with brushes and carburator cleaner, dried, lubed (axles, bearing, etc) and put back together. If after you put it back together, the bearing and axles don't move side to side, but turn smoothly, then you're in business.

Try this before buying a new one.

You have to remove the old one anyway, (remove the glove box, and the bolts are right there. This is a one hour job. No more.

On my 240, it took two days.

on my 850 T5R, one hour. Go figure.

enjoy