Why does the upper thread keep breaking?

There could be several reasons why the upper thread keeps breaking.


  • The upper thread could be installed incorrectly.
    Rethread the machine according to the instructions in the manual. 

Please refer to "Upper threading" of "Preparation" category.

  • The upper thread tension could be set too tight.
    Set the tension to the basic thread tension setting or less.

  • Make sure the spool of thread is installed correctly using the correct size spool cap for the size of spool.

One Point Advice   Place a spool of thread on a spool pin. 

  • The combination of needle size, thread size, and fabric is incorrect.
    Be sure to use the correct needle and thread size for the fabric you are sewing. 
    (Example: Denim-size 16 needle and 40-50heavy-duty threads).

One Point Advice   Combination of fabric, thread and needle 

If your question was not answered, have you checked other FAQs?

Have you checked the manuals?

If you need further assistance, please contact Brother customer service:

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