18aa367c_ooting_Sewing_Machine_Problems__Symptom
[Root Cause] The needle is not in highest position. The needle threader is designed not to turn to protect itself if the needle is not up. The needle has not been fully inserted into needle bar. [Corrective Action] Turn handwheel until needle reaches its highest position. Properly insert needle. [Symptom] 
Threading cannot be done. The needle threader will not turn. The threading hook will not enter needle eye.
Troubleshooting Sewing Machine Problems
Symptom