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#1
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Electric fan motor repair
My faithful oscillating fan has given up the ghost. I know I can
go buy a new one but I like tinkering and fixing things so I'm looking for some help. The facts: 1) Its a three speed table fan with thermal protection that is about 20 years old. 2) There is no hum indicating its trying to spin and giving it a hand doesn't help. 3) I removed the capacitor and tested with a multi-meter on the ohm range. The "resistance" increases steadily to a large number and then goes to zero ( its a 4 uf 230V cap ). I think this means its OK?? 4) There is a "device" in the circuit coming from the neutral to the cap (ie . white--- "device" --- cap ). Its tied with string on top of the winding and inside a clear plastic sleeve, is cylindrical in shape with one end pointed and coloured orange. There are some markings on it but I can't read them without removing it first). The AC voltage before the "device" is 115V. Voltage after the " device" is 11V. Is this the thermal-protection? If so does this indicate it's fired and should be replaced? ( I haven't tried to bypass it because it means snipping some more wires) 5) Near as I can tell there arre no "brush's " but I haven't fully dissasembled ( because I don't figured how to get some of the parts off :-) Most important: I'm reasonably handy but my electronics/motor knowledge is basic high-school level( ie I know what a stator, rotor,armature,commucator etc. are but not sure I can relaibly tell you if its a split-phase, or induction etc type motor ) Any suggestions are appreciated Frank |
#2
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040829 2355 - PSI posted:
My faithful oscillating fan has given up the ghost. I know I can go buy a new one but I like tinkering and fixing things so I'm looking for some help. The facts: 1) Its a three speed table fan with thermal protection that is about 20 years old. 2) There is no hum indicating its trying to spin and giving it a hand doesn't help. 3) I removed the capacitor and tested with a multi-meter on the ohm range. The "resistance" increases steadily to a large number and then goes to zero ( its a 4 uf 230V cap ). I think this means its OK?? 4) There is a "device" in the circuit coming from the neutral to the cap (ie . white--- "device" --- cap ). Its tied with string on top of the winding and inside a clear plastic sleeve, is cylindrical in shape with one end pointed and coloured orange. There are some markings on it but I can't read them without removing it first). The AC voltage before the "device" is 115V. Voltage after the " device" is 11V. Is this the thermal-protection? If so does this indicate it's fired and should be replaced? ( I haven't tried to bypass it because it means snipping some more wires) 5) Near as I can tell there arre no "brush's " but I haven't fully dissasembled ( because I don't figured how to get some of the parts off :-) Most important: I'm reasonably handy but my electronics/motor knowledge is basic high-school level( ie I know what a stator, rotor,armature,commucator etc. are but not sure I can relaibly tell you if its a split-phase, or induction etc type motor ) Any suggestions are appreciated Frank The "device" should be by-passed and see if the motor will run then. You can always add some wires to resolder the "device" back into the circuit. |
#3
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More inserted.
-- Christopher A. Young Learn more about Jesus www.lds.org www.mormons.com "PSI" wrote in message ... My faithful oscillating fan has given up the ghost. I know I can go buy a new one but I like tinkering and fixing things so I'm looking for some help. The facts: 1) Its a three speed table fan with thermal protection that is about 20 years old. SM: Well, a 20 year old fan, you got your use out of it. 2) There is no hum indicating its trying to spin and giving it a hand doesn't help. CY: That's highly signifigant. 3) I removed the capacitor and tested with a multi-meter on the ohm range. The "resistance" increases steadily to a large number and then goes to zero ( its a 4 uf 230V cap ). I think this means its OK?? SM: With a swing meter VOM, on ohms, a good cap will jump the meter and then settle back down towards infinity. Reversing hte leads on the cap will do the same. 4) There is a "device" in the circuit coming from the neutral to the cap (ie . white--- "device" --- cap ). Its tied with string on top of the winding and inside a clear plastic sleeve, is cylindrical in shape with one end pointed and coloured orange. There are some markings on it but I can't read them without removing it first). The AC voltage before the "device" is 115V. Voltage after the " device" is 11V. Is this the thermal-protection? If so does this indicate it's fired and should be replaced? ( I haven't tried to bypass it because it means snipping some more wires) CY: Yes, sure sounds like a thermal fuse to me. 5) Near as I can tell there arre no "brush's " but I haven't fully dissasembled ( because I don't figured how to get some of the parts off :-) CY: Don't have to. Take a bottle of Zoom Spout Turbine oil and give it a squirt where the shaft goes in, on both ends of the armature. If you don't have turbine oil. straight weight 30 (look for ND-30 at the auto parts store) works nicely. Most important: I'm reasonably handy but my electronics/motor knowledge is basic high-school level( ie I know what a stator, rotor,armature,commucator etc. are but not sure I can relaibly tell you if its a split-phase, or induction etc type motor ) SM: Doesn't much matter. Snip the pointy haired boss out (I mean pointy end thingie) and oil the motor shaft. Any suggestions are appreciated SM: Use a butt connector to connect the wires aft4er you snip the thermal out. Be sure to oil the shaft before you turn it back on. Dried out oil can cause over heating. Frank |
#4
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Sounds like a thermal fuse to me. Some appliance parts places h ave them.
-- Christopher A. Young Learn more about Jesus www.lds.org www.mormons.com "indago" wrote in message ... 040829 2355 - PSI posted: The "device" should be by-passed and see if the motor will run then. You can always add some wires to resolder the "device" back into the circuit. |
#5
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Replaced the "device", which I now understand is correctly called a
thermal fuse, cleaned out the dried grease and dust, applied some "electric motor oil" to the shaft and the fan is blowing again - maybe another 20 years. Thanks to everyone for the help. Frank |
#6
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040831 0034 - PSI posted:
Replaced the "device", which I now understand is correctly called a thermal fuse, cleaned out the dried grease and dust, applied some "electric motor oil" to the shaft and the fan is blowing again - maybe another 20 years. Thanks to everyone for the help. Frank Thanks for coming back and letting us know how it all turned out. |
#7
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Y'welcome. Please remit $48.50 for consultation.
-- Christopher A. Young Learn more about Jesus www.lds.org www.mormons.com "PSI" wrote in message ... Replaced the "device", which I now understand is correctly called a thermal fuse, cleaned out the dried grease and dust, applied some "electric motor oil" to the shaft and the fan is blowing again - maybe another 20 years. Thanks to everyone for the help. Frank |
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