Error 101, Error 102

What are ERRORS 101 AND 102 (Main Board and Overload) and how to resolve it. Reasons and Solutions:

A. The most common occurrences of these errors are caused by having thread caught in the hook area, commonly referred to as a "Bird's Nest". Bird nesting typically occurs when the bobbin is not set properly: whether the tension is incorrect, the bobbin case is dirty, or the bobbin is not properly placed in the case.


  1. Remove the excess thread from underneath the needle plate. To do this, you will probably have to cut away all of the nested thread with a pair of scissors.
  2. Remove the bobbin and case from the rotary hook.
  3. Remove the bobbin from the case.
  4. Ensure the bobbin case is clean.
  5. Once the bobbin case is clean, reinsert the bobbin and ensure the tension is correct.
  6. Next, you want to make sure the pre-tension is adjusted correctly.
  7. The last tension adjustment you want to make is to the main tension.
  8. If all of the above steps have been followed and you are still having an issue, you may need a new bobbin case. You can purchase them online at:

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