WOBBLE PROBLEMS:
Loose Screws:  Any one of about 30 screws on the fan being loose can cause wobble.  Tighten the following screws: The screws which hold the blade to the blade iron, the blade iron to the motor. The screws which secure the downrod to the fan motor. The screws which secure the downrod to the mounting ball. The screws  which secure the mounting bracket to the ceiling box. And the screws which attach the ceiling box to the ceiling.  Sometimes there is play between the screw and the hole which it screws through, especially where the arm attaches to the motor.  If the hole is larger than the screw make sure the screw is tightened in the center of the hole rather than along the edge of the hole.

Blade Sets:  Each fan you buy has a matched set of blades which are within 1 gram of each other in weight.  When installing more than one identical fan into a home care must be taken not to intermix blades from one fan with blade from another fan.  This is a common problem when 2 or more identical fans are installed into the same room.  If this occurs, the fan blades should be removed from the fans, weighed on a gram scale, and divided into sets by weight and reattached.  

Balancing Method 1: Number each of your blades on your fan:  Remove two of the blades from the motor. Switch the positions of the blades. Turn on the fan to see if this change reduced the amount of wobble.   If not put the blades back and switch the positions of two other blades until a combination of switching reduces the movement.  You should only balance the fan after making sure all screws are tight as mentioned above.  It is best to balance the fan in the direction you tend to use it the most.  Why?  You may be able to balance the fan perfectly in one direction but when the blade direction is reversed the fan may still wobble in this opposite direction.

Balancing Method 2: Take a lead weight (or a nickel) and tape it onto the top side of one of the blades.  Tape it to the middle area of the blade halfway out from the motor.  Turn the fan on high speed.  If wobble is the same, or worse, remove the weight and attach it onto another blade.  Keep trying this until a blade is found which reduces the amount of movement.  Then remove the weight from the blade which helped reduce movement and place it towards the end of the blade away from the motor and turn the fan on high speed.  If this placement makes it better, you need to possibly add more weight.  If it makes it worse move the weight closer to the motor.  Once you find a position which has the greatest effect, permanently glue the weight to the blade or use double sided tape.

Blade Warping: Remove wood blades from the metal blade iron on all blades. Stack blades on top of each other and look for gaps.   If the blades do not lay flat, they are warped.  In some cases a fan may not wobble with warped blades.  But if after tightening screws and balancing the blades the fan still wobbles, a new set of blades should be purchased to replace the warped blades.

Location:  If the fan blades are within several inches of the ceiling or a wall, wobble can occur due to turbulence of air near the tips of the blades.  Moving the fan further away from the wall or object may decrease the amount of movement.

Ceiling Support:  If the fan is attached to a plastic or fiberglass ceiling box, or if the fan bracket is attached to sheetrock with no ceiling box, the fan is likely to move.  Proper support for a fan consists of a metal box screwed to wood directly above the box, or a UL listed Fan Brace ceiling fan support kit.

Light Kits:  Certain light kits have a certain amount of bounce in them.  Especially those which extend with arms away from the fan.  The design of certain light kits can cause them to shake or shudder when the fan is running causing movement.  This could also be caused by improper mounting of the light kit.  This in turn can get the fan moving with the light kit as it shakes.  In some cases you may find removing your light kit will cause the fan to stop wobbling.  If this is the case you may want to purchase a different light kit which can be more tightly secured to the bottom of the fan, and which does not extend as far away from the center of the fan as your old light..

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