Do you have a ceiling
fan that wobbles every time you turn it on? This is a common occurrence that can
easily be fixed, without having to call a specialist. First, it must be determined
if the fan is rocking or wobbling. A fan that is rocking CAN NOT be balanced,
and the cause is a problem with the installation. Let's look at the difference
between a rocking fan and a wobbling fan. A rocking fan has a side to side, either
vertical or horizontal, movement and a wobbling fan has an orbital movement of
the fan body. This can be easily viewed by taking a 12" piece of string with
a weight attached. Tie or tape the string to the bottom of the fan or light kit.
Turn the fan on at medium speed. As the fan gets up to speed the weight on the
string will start to move. If the weight is moving side to side the fan is rocking
as shown in (Fig#1). If the weight is moving in an orbital, egg shape movement,
the fan is wobbling, as shown in (Fig#2).
Now, let's look at the causes of fan wobble. Some installation problems also can
be the cause. One potential problem is that your ceiling fan has loose screws.
Considering that all ceiling fans have several screws that are used in the assembly
of the fan, it would not be uncommon for some of them to come loose. Start by
tightening all of the screws used to hold the blades to the blade irons and where
the blade iron fastens to the motor as shown as location # 1 (Fig #3). If this
does not work, try securing the down rod to the fan motor as shown in location
#5 (Fig #3). Next, tighten the screws used to secure the down rod to the mounting
ball, the screws for the mounting bracket, and finally, the screws that secure
the ceiling box to the ceiling, as shown in locations #4 and #6 (Fig #3). These
steps should resolve the problem.If the wobble continues, try tightening all other
screws. Listed below and show in (Fig#3) are all other locations on your ceiling
fan that should be checked for loose screws.
Let's check each of these other causes of wobble in order. First, are your blades
flat and straight? This is easy to check. Just get up on a ladder and look down
the length of each blade, as shown in (Fig #4) on the next page. Is each one nice
and flat? There should be no bend and no twist to the blades. Wooden blades contain
water. Over time, the water can evaporate until the moisture content of the blades
is equal to the moisture content of the air in your home. Depending on how the
blade was sliced from the original piece of wood,
and Rocking Fans - ( CONTINUED )
Movement of a Rocking Fan.
( Fig #1 )
of a Wobbling Fan
( Fig #2 )
Fig #3 )