Slow Ceiling Fan


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Old 07-30-16, 07:11 PM
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Slow Ceiling Fan

I have 3 ceiling fans in 3 upstairs bedrooms. Fans are same make and model. Home is approximately 60 years old.

The fan in the master bedroom suddenly decreased in speed on Hi about a month ago. I haven't changed anything on the circuit for that room.

I replaced the fan with same make and model, no change

I swapped a fan from another bedroom with the one in the master bedroom, no change.

I checked the voltage out for the fan in the master bedroom and it's 110.

I replaced the switch for the fan, no change

The only thing that looks out of whack are the wires for the fan, both white but I didn't check to see if one was just a pigtail from black.

Any suggestions much appreciated.
 
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Old 07-30-16, 07:17 PM
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I checked the voltage out for the fan in the master bedroom and it's 110.
Nominal voltage is 120. 110 is not that low but it is suspect. You need to measure the voltage under load. Try connecting a receptacle instead of the fan plug in a lamp with an incandescent bulb and measure the voltage with the light on.
 
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Old 07-31-16, 08:34 AM
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Thanks Ray

Not sure I understand the configuration. Are you saying:

1) Turn off the fan and plug in a light on the same circuit and measure it

or

2) Disconnect the fan and wire up a socket and turn it on, measure across the socket

3) or?

There is a ceiling exhaust fan/heater and lights in the adjacent bathroom that are on that same circuit. I flipped them all on to see if there was a noticeable difference in the fan speed. There was not.
 
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Old 07-31-16, 10:29 AM
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As long as those lights were on the same circuit, you did what Ray wanted. Is it possible the fans work off a remote control or off a dimmer switch? The physical fan must be on its highest speed for a remote control or dimmer to work properly.
 
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Old 07-31-16, 10:32 AM
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chandler, no remote, just a pull chain to change fan speed.
 
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Old 07-31-16, 11:53 AM
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2) Disconnect the fan and wire up a socket and turn it on, measure across the socket
Not sure what you mean by socket but yes, a receptacle with a light plugged in.
 
 

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