Our fan did not work from the beginning. We had to leave the area, so the dealer shipped the fan to us and I installed it myself. When I took the old fan down, I noticed what the problems were. One of the screws that holds the blade to the motor had fallen out and been replaced with a much longer screw and it was making contact with the motor windings. Would not allow the fan to move and actually created some sparking issues. I also noticed, from time to time, screws laying on the floor, that were falling out of the fan blade brackets. Both on the motor side and the blade side. The new fan came with washers for every screw in the kit. Whoever had assembled the original fan did not use one single washer for any screw and they kept falling out. The vibration of traveling had loosened every screw. I made sure to use a washer on every screw and have not had one fall out since.
Fred