Question about Lasko 2115 Wind Tower Fan
The fan quit working, is there a reset button?
Hi, i've fixed the same problem with my fan. I?m not suggesting that you use my fix, but this is what I did:
It turns out that the red wire going into the fan motor has an inline mini fuse built into it. I had to remove the motor and open it up in order to get at the mini fuse.
I guess the manufacturer really made this one with "no user serviceable parts inside" unless you are a technician or have a technician friend.
What I did first was to check continuity between the motor windings. With the motor wires disconnected, I measured about 30 ohms between the red wire (return) and the other separate motor winding wires: yellow, blue and black. Since the red wire didn't have any connection to the other wires, bingo I found the problem. The windings don't have a return path to complete the circuit. I then had to open the motor to fix the problem.
I was sure to mark the motor housing with index marks to insure correct reassembly after the repair. Once I had the motor apart, I was careful not to stress the motor windings. They are very fragile. I carefully cut away the black shrink tubing on the red wire (this wire is the common return for the 3 speed motor). This revealed something that looked like a resistor between the red wire and the other motor windings. It is actually a 10 amp mini fuse.
I didn't have a replacement fuse that would fit inside the motor as the original so I soldered a jumper across the fuse, covered it with shrink tubing and put an inline fuse holder on the red wire outside the motor. If the fuse blows again, it will be easy to replace. I replaced all broken plastic cable ties that held the windings or cable harness in place.
I then cleaned and lubricated the motor's bushings. I used white lithium grease. The friction created from dry bushings is probably what caused the fuse to blow in the first place.
I reassembled the motor. The motor armature should spin freely if reassembly is correct. If not, redo.
This seems a little long, but it actually worked. The fan is once again pushing that cool breeze.
Also, a note to technicians; a pretty decent application circuit and schematic of the fan?s controller unit IC (SC8207) can be found in pdf format at: http://www.silan.com.cn/english/product/pdf/20090402103358633742652383299234.pdf
Posted on May 31, 2010
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Posted on Jan 02, 2017
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