If motor hums and does not spin, then motor has gone bad.
As motors get older, the motor begin to slow down.
Motors are designed to pull-in cool air across spinning coils inside the rotor.
Once the motor slows down, the motor no longer gets cool air, so it gets hotter, and then overheats, and then rotor no longer spins.
In years past, motors were taken to local electric shop for rewinding Then the motor went back into service.
Today, the motor is thrown in the landfill unless recycled at local scrap metal dealer.
It's a waste that we no longer have small repai9r shops to fix consumer goods like fans, and instead the economy causes us to import another motor because it's cheaper.
If you need further help, I’m available over the phone at
https://www.6ya.com/expert/gene_9f0ef4df2f9897e7
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