- If you have a vaulted ceiling, the down rod must be the correct length or the air flow will be reflected, which causes the fan to rock. The distance between the top of the fan blade and the ceiling must be 12 inches for good air flow. If you have enough space from the ceiling to the top of furniture or the floor, 18 inches is better. If the fan is installed on flat ceilings near walls or other obstacles, you need a distance of 18 inches from the tip of the fan to the obstacle.
- The mounting box, also called the ceiling box, that moves, will cause the ceiling fan to rock. You must correct this problem for safe operation of the fan. If the box moves from side-to-side or up and down, the box may need an extra support beam or brace. It could also mean that the hardware used to mount the box is not tight or has become loose.
- If you have heating or cooling ducts that are higher on the wall close to the fan blades or ceiling, the interrupted air flow will cause the fan to rock. There is nothing you can do to stop the fan from rocking if this is the cause.
- Your ceiling fan may rock slightly during the winter when the fan is running counterclockwise to circulate the heated air. Fans with heavy light kits or lightweight ceiling fans will rock slightly when the fan blades are operating on low speeds. This happens because the airflow is being lifted upwards causing the air to compress, which causes the fan to rock. If everything else checks out on the fan, this could be the reason why the fan is rocking.
Down Rod
Mounting Box
Heating and Cooling Vents
Winter Mode
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