How To Easily Locate The Different Speed Wires of Fan Motor

By on May 9, 2016
fan motor bad repair with replacement

 

 

 

 

 

 

 

 

 

table fan bad repair

The complaint of this stand fan was not working even though the switch already turned On.

From my experience, this kind of problem is usually due to bad motor.  I had to open the fan cover in order to confirm the problem.

bad fan motor

 

The fan motor was checked and found that the coil was burnt.

 

new fan motor

 

I managed to get a new fan motor from local market.

new fan motor install

 

The problem now is how do we know which color wires is for speed 1, speed 2 and speed 3?

wires of fan motor

 

Usually the black wire is the common wire and we need this black wire as a reference to find out the different speed in term of Ohm value.

fan motor bad repair

 

If you are using a manual digital multimeter, set your meter to 2 K ohm. If you are using an auto range digital multimeter, just read from the meter LCD screen the Ohm value. Place the black probe to black wire and the red probe to blue wire. The result was 769 Ohm-see the photo below:

checking fan motor wire

 

Next, place the black probe to black wire and red probe to white wire and I got 656 Ohm.

8

 

Lastly place the black probe to black wire and the red probe to red wire and I got 542 Ohm.

repair fan

fan motor wires

 

According to the Motor theory, lower Ohm value of the motor will increase the speed (speed 3) and higher the Ohm value will decrease the speed (speed 1). After that I soldered all the three wires to the switch board accordingly-see the photo below:

solder back fan motor wires

I hope this article will help you to locate fast the different speed wires of fan motor. Thanks.

suranga

This article was prepared for you by Suranga Bandara who owns an Electronics shop in Anuradapura, Sri Lanka.

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Note: You may check out his previous repair article in the below link:

http://www.jestineyong.com/power-fet-and-5-watt-2-2-0hm-wire-wound-resistor-problem/

 

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18 Comments

  1. Goh K S

    May 9, 2016 at 8:30 am

    Most times, a "burnt" fan motor is caused by an open-circuited thermal fuse (~125 degrees Celcius) that is tied to the actual coil.

    Replacing this thermal fuse, plus a thorough cleaning and lubrication of the shaft and bushings, will solve the problem and extend the life of the fan for a few more years.

    Likes(4)Dislikes(1)
    • suranga bandara, Suranga Electronics

      May 9, 2016 at 12:40 pm

      Hi, I have checked the fuse and it was good. The coil was burnt and the motor had to be replaced.

      Likes(1)Dislikes(0)
      • ananda tammita

        December 12, 2016 at 9:51 pm

        Dear Suranga,
        Where can I buy exact equivalent Three Speed Remote Controlled Fan Motor for Telesonic Brand.
        Thanks,
        Best Regards!

        Ananda

        Likes(0)Dislikes(0)
  2. Anthony

    May 9, 2016 at 9:15 am

    Good repair Suranga and good tip regarding how to test which wire belongs where. Thanks for sharing here !

    Likes(5)Dislikes(0)
    • suranga bandara, Suranga Electronics

      May 9, 2016 at 12:41 pm

      Hi. Thanks !
      Mr-Anthony.

      Likes(0)Dislikes(0)
  3. Parasuraman S

    May 9, 2016 at 10:49 am

    New area of servicing, I think! Jumped to electrical servicing suddenly! A good informative article!

    Likes(1)Dislikes(0)
    • suranga bandara, Suranga Electronics

      May 9, 2016 at 12:43 pm

      Hello Mr, Parasuraman,

      Thanks You !

      Likes(1)Dislikes(0)
  4. Ehsan Murad

    May 9, 2016 at 12:26 pm

    Nice and simple.Thanks.

    Likes(1)Dislikes(0)
  5. biruk aweke

    May 9, 2016 at 1:20 pm

    itis very nice explanation; thanks for sharing.

    Likes(1)Dislikes(0)
  6. Albert van Bemmelen

    May 9, 2016 at 7:06 pm

    Thank you Mr. Suranga. Although electrical servicing is not my field
    of interest. It is no doubt a repair and so I have fixed a few electric
    Standing Fans myself before too. Because these Fans rotate over an angle
    of about 180 degrees, the electrical wiring inside the Standard often
    breaks open and needs to be completely replaced. Finding the correct
    flexible cable then is always a bit of a problem. And the wiring is
    probably a bit more expensive too compared to the standard hard copper
    wiring. Nowadays I only repair electrical devices like Washing Machines
    for a friend by replacing the defect electronic components on them. Like
    the bad LNK304 and LNK305's and 47 Ohm resistors on them. It is a bit
    more interesting but it always the same component that dies.

    Likes(2)Dislikes(0)
    • suranga bandara, Suranga Electronics

      May 10, 2016 at 4:00 pm

      Hi. Mr- Albert van Bemmelen,

      Thanks ! Your Feed back.

      Likes(0)Dislikes(0)
  7. Robert Calk

    May 9, 2016 at 11:58 pm

    Thanks Suranga. I repaired a fan for my son one time that had a blown thermal fuse. It wasn't really worth the trouble since the fan was cheap to replace, but I gained experience and satisfaction from repairing it.

    Likes(1)Dislikes(0)
    • Beau Michna

      May 12, 2016 at 11:44 am

      Same here, curiosity took over.

      Likes(1)Dislikes(0)
  8. Humberto

    May 11, 2016 at 8:01 pm

    Thanks Suranga, I've read your article very carefully and you have given useful tips. Congratulations and waiting for some more articles.

    Likes(0)Dislikes(0)
  9. Yogesh Panchal

    May 13, 2016 at 3:12 pm

    well done! Suranga.

    Likes(1)Dislikes(0)
  10. Texas Klipee

    November 6, 2017 at 1:50 am

    Sir Mere table fan ka wire jodne me main comfus hu pehele aluminum ki rewinding thi abhi coper ki rewinding ki hai abhi 4 wire motor ke hai our 5 wire pehele se hi hai abhi konsa wire kaha jode aap thoda help kisike...
    ====================================

    Sir is the table fan of the main comfus hu pehele aluminium that is rewinding the copper that has rewinding 4 wire motor, we have the wire to connect with the wire which has some jod help you can help ... please help me sir

    Likes(0)Dislikes(0)
  11. Indika

    March 31, 2018 at 1:40 am

    Thanks mr.suranga.very useful tips....

    Likes(0)Dislikes(0)
  12. Roger

    September 18, 2018 at 4:46 pm

    I have a National stand fan had a spark when i turned it on. I found that the coil wires had a short but still intact. The wire insulator fused caused the spark probably caused by heat. After changing the wire, 1st and 2nd speed works but the 3rd speed acted weird. It spin fast for a few seconds and then stopped or moved very slowly, as if it is jammed, but the spindle moves freely when stop. Can anyone point out what could be the reason for it. Thanks.

    Likes(0)Dislikes(0)

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