Symptoms
- Fan visibly shakes or wobbles at higher speeds
- Wobble gets worse the faster the fan runs
- Light fixtures on the fan may rattle or flicker
Likely causes
- CommonUnbalanced bladesBlades that aren't perfectly matched in weight are one of the most common causes of wobble.
- CommonLoose blade screws or blade holder connectionsVibration over time loosens the screws holding blades to their arms.
- PossibleA loose mounting bracket or downrod connectionThe connection at the ceiling or where the fan attaches to its downrod can loosen.
- PossibleA warped or bent bladeBlades can warp from heat, humidity, or physical damage over time.
- PossibleAn outlet box not rated or braced for a ceiling fanA standard light-only box isn't designed to handle a fan's weight and vibration.
What to do
- Turn off the fan and tighten all visible screws on the blades and blade brackets.
- Check and tighten the screws where the fan housing meets the downrod or ceiling mount.
- Use a balancing kit (usually included as small weight clips) by testing one blade at a time to find the imbalanced one.
- Measure each blade's distance to the ceiling while rotated to the same position, to check for a bent blade.
- Replace a warped or bent blade rather than trying to straighten it.
- Confirm the ceiling box is fan-rated if the wobble seems to come from the ceiling connection itself, not the blades.
- Call an electrician if the box isn't fan-rated or braced, since that's a safety issue beyond simple balancing.
Tools and parts
- Ceiling fan balancing kit
- Screwdriver
- Step ladder
Ceiling fan balancing kitSearch: “ceiling fan blade balancing kit”
When to call a pro
Call an electrician if the ceiling box isn't rated for a fan, or if tightening and balancing doesn't resolve a strong wobble.
Safety
Use caution
Turn off the fan and let it stop completely before touching the blades, and have an electrician check an unbraced or non-fan-rated ceiling box before continuing to use the fan.