Ensure all screws are properly tightened.
Ensure that the fan-rated junction or outlet box is secured to the joist or block, and the hanger bracket is securely attached.
Verify that the hanger ball is properly seated in the provided hanger bracket.
Verify proper installation of blades and blade holders.
Confirm that all packaging motor stops have been removed.
Ensure the light plate is not upside down (if included).