Fan is wobbling and noisy--cannot figure how to tighten the light fixture part of fan

It is entirely possible that the typical 3 screws that hold the blades to the fan arms have loosened up over the years. I would take a screw driver and tighten them. If they loosen they will sag at the ends and touch any frame under them.

wobbly cieling fan
1. make sure all mounting screws between the fan and the ceiling are tight. There is probably an electrical box mounted in the cieling that the fan is screwed into. I would turn the fan light on and then keep flipping breakers off, on at a time ,to see which breaker turns off the fan light. leave the fan light breaker off and you can unmount the fan from the cieling electrical box. The electrical box may have several holes in it for mounting screws and prehaps there are some holes left empty in the box that you can put more wood screws into to help keep the electrical box more firmly mounted and that may help lessen the wobble.
Its ok to bend the electrical wiring aside to put more screws in. Just be reasonably gentle with the wiring and then bend it back somewhat to where it was before you started. make sure that wiring does not get pinched between the fan and the electrical box and that all wiring resides inside the box.
#2 This is harder to do. you need to balance the blades for the fan ,similar to how a lawnmower blade is balanced after sharpening and before remounting the lawnmower blade on the mower. also kinda like balancing a car tire. I have a lawnmower blade balancing fixture that i bought at the lawnmower shop, but i dont know if there is a fan blade balancing fixture that you could buy from somewheres. Maybe try google.com,bing.com or ask.com and type into the search box fan blade balancer
or fan blade balancing fixture or fan blade balancing jig.
PLEASE read the directions or SPECIFICATIONS before you buy the fan blade balancer, only to find out that it only fits 9 inch diameter fan blades, and your blade is 2 4or 36 inches long.
The balancer may have to fit a certain diameter hole at the center
of the fan blade. When you finally find out which side of the fan blade is heavy, you have to grind , with an electric grinding wheel, some material off the heavy side of the blade so that it is the same wieght as the light side of the blade.
Try to imagine a cone shaped center[like step drills] like the capital letter V ,only up side down, so that the point is up. ON the underside of the inverted V is a needle tiped post that upside down V can pivot in any direction on. The hole in the middle of a lawnmower blade is centered somewheres on the outside of the inverted V, depending on the diameter of the hole in the lawnmower blade. The heavy side of the mower blade will go down and may touch the level asphault or the table top, depending on where you placed the balancing fixture. THen i would grind off metal until the heavy side can up to be level with the light side of the mower blade and it was considered balanced.
an appliance repair parts store may sell fan balancers, but if the would fit your cieling fan, better ask before you waiste your money on something that wont work for what you want.

Try calling up customer service of the manufacturor of your ceiling fan and ask about repair service for your brand fan.
see what repair service has to say, im sure many others have asked them about wobbling fans.
so they should have all the answers down pat.
Two more thoughts.
1.
.MAKE SURE ALL SCREWS THAT HOLD FAN BLADES ON TO THE HUB ARE THERE AND are TIGHT. one loose fan blade mounting screw or one missing fan blade screw will unbalance the whole thing and cause wobble.
2. the fan motor shaft bearing could be worn out or round or even egg shaped. If this is the cause, the motor must be diaassembled and new fan shaft bearings installed or the fan motor must be replaced.

good luck and have fun!

The fan wobbles cause you bought a crappy Harbor Breeze or Hampton Bay fan. The fan blades need to be balanced with a fan balance kit that comes in the box. You probably threw it out cause you didn't know what the package of weights was for. Get you a Hunter ceiling fan and you won't have an issue with fan wobble, because their fans have better quality control before leaving the factory. If you installed the fan without adequate bracket support- you best get a pro to help you out cause there is no fan wobble help for stupidity.

If what you are calling a center piece is the safety grill, it has clips around the edges to remove the screen for service or cleaning.
If the fan is wobbling, the nut in the center of the fan needs to be tightened.
Jim Hart

Turn the motor off and move the pulley by hand, if theres alot of slop in it, change out the water pump.

It is unusual for fans to become noisy buy with the power off you can check to see if it the fan has something trapped in it - in which case remove it. Also check to see if there is any blade damage. Check to make sure it is securely fastened and if not tighten the screws / bolts that secure it. Spin the blades with your finger to see if it makes any noise, wobbles or is difficult to move. If so then it may need replacing. Make sure the blades do not protrude out of the casing - if so push down on the centre of the blade to see if it will go back into position. The power to the fan may be unregulated so the fan may change speed and effectively pulse and therefore change pitch – check the supply voltage and ripple content. Other than that the fan may just need replacing.

Depending on where it's loose it would be tightened with the nut on the shaft/pipe going into the bottom of the fan or, tightening the screws which fasten the housing to the light fixture is -- these will be in the side of the lower cup which connects to the fan housing.

Charlie

Definetly need a new blade

#K7458-000 Boan/nutone part number