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A possible reason is that the start-and-run capacitor on the fan motor has developed a fault, meaning it has gone wrong and doesn't work to start the motor any more. If you flick the fan blades and that spins the motor enough to get it moving, if it continues running until it next gets switched off, then you know the start-and-run capacitor has died.

As you asked this question here, it is unlikely you are already a licensed electrician, so you will need to call one to get this fault fixed, or have a complete new ceiling fan installed.

IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOB

SAFELY AND COMPETENTLY

REFER THIS WORK TO QUALIFIED PROFESSIONALS.

If you do this work yourself, always turn off the power

at the breaker box/fuse panel BEFORE you attempt to do any work AND

always use an electrician's test meter having metal-tipped probes

(not a simple proximity voltage indicator)

to insure the circuit is, in fact, de-energized.

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15y ago
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13y ago

You don't say where this fan is - it could be in a wall vent as an extractor fan or in an air conditioner unit or in an electric space heater...

There could be many possible reasons why the fan won't turn. Here are just two of them:

1) Dust and dirt deposited from the air is clogging-up its fan blades and fan housing so the blades won't spin until you flick them. The fan and its housing needs to be cleaned out.

2) The start-and-run capacitor on the fan motor has developed a fault, meaning it has gone wrong and doesn't work to start the motor any more. When you flick the fan blades that spins the motor enough to get it moving and it will continue running until it next gets switched off by the AC unit's thermostat.

As you asked this question here, it is unlikely you are already a licensed heating and ventilation technician, so you will need to call one to get this fault fixed.

It will get worse unless you get it done soon.

If you do this work yourself,

always turn off the power at the breaker box/fuse panel

BEFORE you attempt to do any work

AND

always use a meter or voltage indicator to insure the circuit is, in fact, de-energize.

IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOB

SAFELY AND COMPETENTLY

REFER THIS WORK TO QUALIFIED PROFESSIONALS.

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13y ago

home appliances

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Q: What causes ceiling fan motors to hum?
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