I would think if the electric fan vibrates it has lost a blade or balancing weight. Usually, electric fans are quiet and pretty much vibration free.
1949 F-4 Built to drive--script bed.
2007 F150 SC. Driven once in a while.
2015 Escape SE EB Wife's ride
US Government conceived by genius, now operated by fools. Everyone understand Agenda 2030 and where it is taking us?