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Find Small AC motor Fusable Link?

Discussion in 'Electronic Repair' started by KenO, Aug 20, 2013.

  1. KenO

    KenO Guest

    Have a 16" Chinese AC Electric Fan that has a blown motor due to lack of lub.

    Did some quick checking and the motor blew before doing unrepairable damage to the bushings.

    Have never had a blown Chinese AC Electric Motor before so would be interested in any tips finding the blown fusable link.

    Did some forum searching but found nothing using AC electric motor fusable link but found nothing.

    Thanks

    Ken
     
  2. Paul Drahn

    Paul Drahn Guest

    You will find it hidden in the motor field windings. These are not
    repairable. Similar to letting the magic smoke out and being unable to
    get it back in the component.

    Paul
     
  3. I just had a crappy Lakewood 20" box fan burn out. I've been oiling the
    bearings for years to keep the junker running, but today it just died
    while I was sitting a few feet away.

    It turns out there's slim thermal fuse hidden in the vinyl tubing where
    the leads for power/speed and the run cap are attached to the windings.

    It would be a 10 minute repair, if I had any spare 115C 2amp thermal
    fuses.

    Taking into account that the newer version of window fans are even
    junkier, it may be worth the $5 to get a hong kong post 10 pack of ebay
    thermal fuses and hope at least one works.

    It is quite possible some of these cheapo fan motors can be fixed, or at
    least tricked back into sort of working.

    The motor in my case wasn't even varnish dipped. You can dig straight into
    the windings with a spudging tool.
     
  4. KenO

    KenO Guest

    Cydrome Leader,

    "...Lakewood 20" box fan...there's slim thermal fuse hidden in the vinyl tubing where the leads for power/speed and the run cap are attached to the windings."

    Thanks for the tip.

    Any suggestions concerning how you found it?

    Thanks

    Ken
     
  5. Guest

    I use a dressmaking pin and two clip leads and my ohmmeter. One clip lead goes to one end of the winding, the other clip lead holds the pin. I carefully use the pin to probe the various field coils till I find where the open is located. A sharp pin can penetrate the insulation on the individual wires without shorting anything, if you don't have a ham hand. I usually find the non-resetting fuse at one end or the other of the windings, they don't seem to put them in the middle.
     
  6. KenO

    KenO Guest



    Thanks for your detailed suggestions.

    Ken
     
  7. KenO

    KenO Guest

    everyone,

    Since posting I have been searching in the hope that someone else had a a blown fuse on an electric fan like mine.

    Finally found a detailed instruction for this at
    http://www.instructables.com/id/FAN-repair/step3/Thermal-Fuse-Replacement/

    It has some good photos and the motor looks just like mine. Only difference is mine does Not have a timer.

    Would be interested in any comments by anyone who has done this repair.

    Do you agree with everything or have any any additional suggestions?

    Thanks

    Ken
     
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