Either a bad capacitor or damaged winding.
Ceiling fan moving slowly.
The other two are electrical.
Then move the coin up and down the blade trying heavier coins as necessary until you find the optimal balance.
Loss of bearing lubrication and poor blade balance.
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Is your fan running slow.
Two of these issues are mechanical.
New ceiling fan runs slow even on highest setting our home is a new build and was pre wired for ceiling fans.
Our ceiling fan was not turning at full speed when selecting high speed the.
The slowness of the fan is sometimes cause by the capacitor if it s running slowly without making noise.
Start by taping a dime to the middle of a single blade and turning the fan on high.
Watch this video as this will help you troubleshoot and repair it under 10.
If it s making noise then that s because of lack of oil in the motor.
All ceiling mounts have copper black white and red wires coming from them and are connected to a two way switch on the wall one controls fan speed the other the light.