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Fan Blades Won't Spin? Check This Common Cause
Fan hums but blades won't move? Fix the most common cause.
Difficulty:Moderate
Time:30-45 min
Success:80%
help1. Understand the Problem
The start capacitor has likely failed, preventing the motor from getting the initial jolt of power.
build_circle2. Try This First
Best First Step
Check the Capacitor
Turn off the breaker, open the fan housing, and look for a swollen or melted black box (capacitor).
visibility3. Visual Guidance
See what's happening and how to try the first recovery step.
autorenew4. If That Doesn't Work
Try the next recovery options.
autorenew
Spin by HandIf it spins freely by hand but won't start, it's the capacitor.
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Check BearingsIf it's stiff to turn, the motor bearings need oil or replacement.
chevron_rightFrequently Asked Questions
What does a bad ceiling fan capacitor look like?expand_more
A failed capacitor often looks swollen, bulged, or melted. It's usually a small black box tucked inside the switch housing (where the pull chains are). Sometimes you might even see a burn mark or smell burnt plastic.
Is it dangerous to spin a ceiling fan by hand to start it?expand_more
If it's just a bad capacitor, spinning it by hand will often get it going safely. However, if the motor bearings are seized and you force it, you could overheat the motor and cause a fire hazard. Always test if it spins freely with the power off first.
Do I need an exact match when buying a replacement capacitor?expand_more
Yes, you must match the microfarad (µF) rating and the number of wires (usually 2, 3, or 4). The voltage rating (e.g., 250V or 300V) can be equal to or higher than your old one, but never lower.
warning5. Stop DIY If
Don't continue if any of these apply.
reportYou don't have a voltage tester
reportWiring looks burnt or smells like ozone
reportYou are uncomfortable on a ladder
Still stuck?Get personalized help with AI Recovery.
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View all arrow_forwardThis page provides general DIY guidance.
If you're unsure, it's always best to consult a professional.