Installation & repair

What’s wrong with ceiling fan shakes on high speed? How to balance a wobbly ceiling fan

Ceiling fans are a very common cooling device for people when summer comes. However, if used improperly, the ceiling fan will wobble and be dangerous for consumers. Toby Nwazor will have a post on about what’s wrong with ceiling fan shakes on high speed. At the same time, the article also mentions how to balance a wobbly ceiling fan.

What’s wrong with ceiling fan shakes on high speed?

Cause of propeller

The propeller is deformed, the angle of the blades is not uniform

Due to improper operation or inspection and repair, the propellers are impacted and deformed, the shape of the blades is not the same. After assembly due to unbalance, the rotating propeller causes the guard net to shake, producing a very loud noise.

Use your hand to gently rotate the propeller, making the front end of each propeller to the front of the protective grille evenly for the same distance, you can use your hand or a tool to bend the propeller. Next is to adjust the propellers so that its rear end to the back of the guard net is equally spaced. Here are the big reasons.

Propeller is a bit heavy

Because the weight of each propeller is not the same, it will cause the fan to vibrate, producing very loud noise and vibration. You need to disassemble the propellers, use the scale to re-measure the weight, drill to remove the metal part on the back of the steam propeller, when the propeller is balanced.

Propeller shooting position is not correct

The installation position of the propeller hood is not correct, resulting in eccentricity, resulting in vibration and noise. The solution is to adjust and change the position of the propeller, in a position so that there is minimal vibration and noise.

Coordination between propeller shaft and electric motor rotation shaft is too loose

When mounting between the propeller shaft and the electric motor rotating shaft, the clearance is too large, causing the impeller to be eccentric. So when spinning, it will make a loud noise. You just need to take thin copper foil to wrap the shaft to fit. Coordination between propeller shaft and electric motor rotation shaft is too loose

Cause of bearing

Oil bearing bearing wear, large clearance

The coordination between the crankshaft and the bearing is too loose which increases the noise. It even causes friction between the steel core of the stator and the rotor.

To check if the bearing clearance is too large, you can clean the bearing with fine sandpaper, then stand the spindle and install the bearing. If the bearing cannot automatically slide down or you have to gently touch it with your hand, the bearing can slide down, which indicates that the clearance between the rotating shaft and the bearing is reasonable. But if the bearing automatically slides down, the clearance is large.

  • Oil-filled bearings (bearings) must be mounted 180º backwards.
  • The oil seal must be filled with oil, when applying oil to the oiling hole to ensure long-term lubrication.
  • If it cannot be solved, only a new bearing (bearing) can be replaced.

Abrasive oil bearing, large clearance

Concentrically is not high

The concentrically between the rotor and the two front and rear shields of the electric fan is not high, so it generates vibration and noise when operating.

A simple solution is when assembling the front and rear end caps, tighten the fixed screw on one side, turn the rotor gently on the other hand, and finally tighten the fixed screw.

A radical solution is to check the front and rear neat rings, if it is oval, it needs to be repaired or replaced. The outer ring of the rotor must be ground or turned round. Manually attach the head cover to the rotor ring, only needing very little force to be able to snap in easily.

Due to the vibration of the steel core

The stator core is made of silicon corrugated iron sheets that are pressed into shapes and then pressed on top of each other. Due to the long operating time under the effect of electromagnetic force and the change of temperature, the vibration of the steel core is generated, so there is strong vibration and noise.

At the same time, due to the vibration of the steel core, the stator groove displacement phenomenon causes the insulation paper in the groove to be damaged, which may cause the winding to be grounded.

In order to solve the problem of the steel core being skewed, the steel core should be pressed tightly, making the stamping sheets tightly pressed together, overlapping, the stator grooves are flat.

Due to the vibration of the steel core

What’s wrong with ceiling fan shakes on high speed?

Due to the device being shaken

Usually equipment swings are caused by standing fans, table fans placed in uneven positions, chipped blades, loose fan cages, worn gears or improper assembly, etc. for the electric motor to vibrate and have cyclic noise.

Solve the problem by checking the position of the fan, tightening the fan cage after disassembly, replacing the gear wheel with a new one, applying reasonable assembly technology, periodically oiling the device.

Due to the device being shaken

Coil fault cause

If the quality of the bearing, the electric fan is good, and the assembly is correct, the cause of the noise of the electric motor is a problem from the coil. When repairing, the number of turns of the coil is not correct, making the magnetic field asymmetrical, producing electromagnetic buzzing.

To judge if it is due to a coil failure, can replace the bearing with the correct type, remove the fan, run idling to see if the noise of the electric motor is ok, if there is still noise, it can be judged. I guess it is due to a coil problem. If there is no noise, reinstall the blower, idling to try, recheck the noise of the electric motor.

Cause of coil failure

Due to the uneven air gap, electromagnetic buzzing will be generated, creating uneven air gap causes: bent spindle, worn bearing, improper assembly or deformed locomotive cover and stator housing.

The simple solution is to rotate the machine head cover to an angle so that the air gap can be adjusted well.

How to balance a wobbly ceiling fan on high speed

Step 1: Check for accumulated dust

People often skip dusting the propellers when cleaning their homes, so dust can accumulate over several months or years to form a weight large enough to deflect the blades and cause them to wobble. Turn off the fan and wait for the blades to come to a complete stop to clean the dust above, on the sides and below the blades. If it still shakes, it could be a loose fan blade.

Step 2: Check that the wings are tightened

Ceiling fan screws loose

Look at the fan’s motor – the ceiling mount – find the point where the propeller is attached to the fan body. Use a screwdriver to tighten the loose screws. If any fan blades are loose, remove and clean them, then reinstall them securely.

Step 3: Measure the distance to see if it is uneven

Use a ruler or tape measure to measure the distance from the tip of the propeller to the ceiling (which is the furthest point from the junction of the propeller and motor). Measure for the entire propeller.

If there is a propeller with a shorter or longer distance than the others, use the hand to straighten and adjust it gently at the propeller holder. Remember not to break or deflect any part attached to the engine, only adjust the propeller.

Step 4: Prepare to weigh the ceiling fan

A set of ceiling fan scale clamps can be purchased easily at electrical equipment stores for a very cheap price. A set of these clamps usually consists of a U-clamp and several lightweight pieces with one side that can be attached to the clamp. It is possible to use more than one set when subjected to strong vibrations, but it is not strictly necessary.

Step 5: Put the U-clip on the propeller

Clip the U-clip to the center of any fan and turn the fan back on to see if the level of vibration subsides. Then try again on the remaining propellers in the same position. Assess whether when clamping to which propeller, the fan rotates most stably, it is the propeller that needs to be clamped.

Step 6: Determine the best position to clamp the U-clamp

Move the clamp from the center of the propeller to the end and tip of the blade, 5-10cm at a time, and turn on the fan to check for vibration. Compare to determine the best position for the U-clamp to minimize vibrations.

Step 7: Align the propeller

Once that best position has been determined, remove the U-clip and stick the propeller scale in the same spot. If the fan is still shaking, stick a piece of scale on top of the old scale. If the fan shakes more after gluing, then peel it off and use a U-clip to find a more suitable location like the steps above.

How to balance a ceiling fan without an equalizer


  • Balancing a ceiling fan without an equalizer is a simple process. You just need to prepare a set of the following supplies:
  • Paint Tape: Use blue paint tape to secure the coins to each propeller. Blue tape is great because it leaves no residue and is very easy to work with.
  • Coin: Coins are perfect for balancing a fan without a kit because they are flat and come in a variety of weights. You will need at least a quarter, a nickel and 1 or 2 cents.
  • Ladder: A ladder or chair is required to reach the top of each ceiling fan.
  • Wipes: Wipes or wipes are used to wipe the blades of dust and debris before leveling
  • Pencil: Use a pencil to number each propeller for reference and note the coin’s placement and impact.

How to balance a ceiling fan without an equalizer

Can I Install a Ceiling Fan Where a Light Fixture is Now
What’s wrong with ceiling fan shakes on high speed?

Step 1 – Clean the ceiling dust for the ceiling fan to reduce vibration

Wipe down the ceiling fan blades with a damp cloth or cleaning cloth to remove dust and debris. In fact, simply wiping the dust off the case can reduce noise and vibrations. But this step is important so that you have a clean ceiling fan to start with and also for the coins to stick to the tape.

Step 2 – Mark and number each propeller for reference

Mark the tip of each propeller with a pencil or non-permanent marker with consecutive numbers. The numbers will give you a reference of each propeller as you make changes to weight and balance. Marking the edges with numbers will save you from confusion and take only a few seconds.

Step 3 – Stick a quarter to the tip of each propeller

Simply take some blue paint tape and stick a quarter to the end of a propeller.

The penis should lie flat and at the top of the blade. Turn the ceiling fan on high and see if the fan wobbles more or less.

Take the quarter out of that propeller, then stick it on another side and see how it improves the amount of wobble. You are looking for the side that gives the biggest improvement with the glued quarter.

Step 4 – Glue a piece of nickel to the adjacent ceiling fan to fine-tune the balance

Apply a layer of nickel to the adjacent propeller so you can improve the balance even more. If that doesn’t improve the balance, try another adjacent side in nickel. You can also try different areas along the length of the nickel propeller. If you place the nickel further towards the center, it will have less impact.

Step 5 – Make Notes on the Location and Impact of Additional Coins

Always mark your ceiling fan or notebook with a pencil to keep track of where you place it. You also want to take a physical or mental note of how it affects you so you remember the best areas. If you don’t want to mark the fan blades, you can draw a diagram of the ceiling fan in a sticky note.

Step 6 – Stick a coin in different areas for more balance

Glue a coin to different areas of the propeller with a quarter and to the adjacent wing with nickel. You can experiment with different fields and with many coins, to try to get the best results.

Step 7 – Permanent ice coins with clear tape

Glue the coins with clear tape to hold them in place.

F.A.Q: What’s wrong with ceiling fan shakes?

What’s wrong with ceiling fan shakes on high speed?

Does the length of the hanger have any effect on ceiling fan balance?

Improper standards and incorrect lengths can also cause the fan to vibrate during operation. Therefore, please use the standard hanging wire to install the ceiling fan. The most reasonable distance from the floor to the ceiling fan should be in the range of 2.5 – 2.7 meters and should not be more than 4 meters. Therefore, you should prioritize choosing ceiling fans with the right shaft to ensure this distance or choose fans with variable length shafts to easily adjust to this distance.

Are there any important precautions when using a ceiling fan to avoid wobbling?

  • Do not attempt to repair it yourself without knowing the cause of the fan vibration.
  • Do not attempt to repair a shaking ceiling fan yourself if you are not knowledgeable about electric fan – ceiling fan techniques.
  • Need to disconnect the power, do not let the fan run during repair to avoid danger.
  • Specialized tools are required for better disassembly and repair.

Is it always possible to balance the fan with a coin?

Balancing ceiling fans without equalizer can be applied with minor errors. It’s basically a trial and error method where you stick a quarter on top of each propeller. From there, you can use the coin to process. It is important to mark each propeller and note down which areas have the greatest impact. You also need to clean off dust and debris from the ceiling fan before leveling.

Can a wobbly ceiling fan fall off?

The swaying is not caused by the ceiling or the specific way the fan is installed. Swinging will not drop the fan, and there have been no reports of such. However, wobbling can cause the visor or light fixture to loosen and potentially fall.


Above are useful general information made by Toby Nwazor. Hopefully, through the article, readers have been able to answer their own questions about unbalanced and wobbly ceiling fans.

Toby Nwazor

Toby Nwazor is a serial entrepreneur, a success coach, a business development consultant, a strategist, a motivational speaker, and a freelance writer. He writes on other cool platforms like Entrepreneur magazine,, Good Men Project, and Business 2 Community and author of website articles . He is the founder of My Startup CEO where he gives kick-ass motivation and provides helpful tips for start-up business success. Follow him on Twitter, and Like MSC on Facebook

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