
TROUBLESHOOTING GUIDE
| Problem | Possible Cause | Solution | 
| TOP THREAD BREAKS | Machine is threaded incorrectly . . . . . | Rethread machine and needle | 
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 | Tension is too tight . . . . . . . . . . . . . . . | Reduce tension on top to a smaller number | 
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 | Thread is too heavy for needle size . . . | Use a larger needle | 
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 | Needle is inserted incorrectly . . . . . . . | Reinsert needle with flat side toward back | 
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 | Needle is damaged . . . . . . . . . . . . . . . | Insert new needle | 
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 | Thread is caught on spool pin . . . . . . . | Remove spool, unwind excess thread, clip, turn spool | 
| 
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 | over, and use felt disc on spool pin | 
| LOWER THREAD BREAKS | Bobbin case is not inserted correctly . . | Reposition bobbin. If thread pulls smoothly, it is correct | 
| 
 | Bobbin case is improperly threaded . . . . | Refer to instructions for correct threading | 
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 | Bobbin tension is too tight. . . . . . . . . . | Change bobbin tension according to instructions | 
| SKIPPED STITCHES | Needle is not inserted correctly. . . . . . | Reinsert needle with flat side toward back | 
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 | Needle is damaged . . . . . . . . . . . . . . . | Insert new needle | 
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 | Wrong type of needle is used . . . . . . . | Match needle size to fabric and thread weight | 
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 | Wrong presser foot is used . . . . . . . . . | Check the proper presser foot needed for specific task | 
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 | Foot pressure is wrong. . . . . . . . . . . . . | Check foot pressure regulation for proper setting | 
| NEEDLE BREAKS | Needle is damaged . . . . . . . . . . . . . . . | Insert new needle | 
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 | Needle is not inserted correctly. . . . . . | Reinsert needle with flat side toward back | 
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 | Fabric is too heavy/wrong needle size . . | Match needle size to fabric and thread weight | 
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 | Fabric is being pulled during sewing . . | Check for proper foot pressure; make sure feed teeth | 
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 | are raised and operating correctly; lengthen stitch | 
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 | length. Fabric should feed automatically. Pulling the | 
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 | fabric will throw the machine out of time. | 
| STITCHING FORMS LOOPS | Needle is not threaded correctly . . . . . | Thread needle from front to back | 
| 
 | Bobbin is not threaded correctly . . . . . | Check instructions for proper bobbin threading | 
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 | Improper needle and/or thread used . . | Match needle size to fabric and thread weight | 
| SEAMS SHRINK OR PUCKER | Presser foot pressure is too heavy . . . . | Reduce presser foot pressure to a lower number | 
| THREAD BUNCHING OR | Top tension is too loose. . . . . . . . . . . . | Increase top tension to a higher number. Normal | 
| “NESTING” ON UNDERSIDE | 
 | settings are between  | 
| OF FABRIC | Machine is not threaded correctly . . . . | Rethread machine making sure presser foot is raised | 
| 
 | 
 | and the  | 
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 | presser foot will help seat the thread between the | 
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 | tension discs. | 
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 | Bobbin case is improperly threaded . . . . | Refer to instructions for correct threading | 
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 | Thread is of poor quality . . . . . . . . . . . | Use quality thread | 
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 | Needle is too large for fabric . . . . . . . . | Use a smaller size needle | 
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 | Wrong stitch length is used . . . . . . . . . | Adjust length for proper stitches | 
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 | Top and bottom threads are not. . . . . . | Draw both threads back under the presser foot and | 
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 | drawn back under the presser | hold until a few stitches have formed | 
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 | foot before sewing | 
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