Troubleshooting guide
Problem
Cause
Correction
Reference
Upper thread
breaks
1. The machine is not threaded correctly.
1. Rethread the upper thread.
16
2. The thread tension is too tight.
2. Reduce the thread tension (to lower number).
23
3. The thread is too thick for the needle.
3. Select a larger needle size.
18
4. The needle is not inserted correctly.
4. Remove and reinsert the needle (flat side towards the back).
18
5. The thread is wound around the spool holder pin.
5. Remove the reel and wind up the thread onto the reel.
16
6. The needle is damaged.
6. Insert a new needle.
18
Bobbin thread
breaks
1. The bobbin case is not inserted correctly.
1. Remove and reinsert the bobbin case and pull on the thread.
15
2. The bobbin case is threaded wrong.
2. Check both bobbin and bobbin case if on the correct position.
15
Skipped stitches
1. The needle is not inserted correctly.
1. Remove and reinsert the needle (flat side towards the back).
18
2. The needle is damaged.
2. Insert a new needle.
18
3. The wrong size needle has been used.
3. Choose a needle to suit the thread.
18
4. The presser foot is not attached correctly.
4. Check and attach it correctly.
21
5. The machine is not threaded correctly.
5. Rethread the upper thread.
16
Needle breaks
1. The needle is damaged.
1. Insert a new needle.
18
2. The needle is not correctly inserted.
2. Insert the needle correctly (flat side towards the back).
18
3. Wrong needle size for the fabric.
3. Choose a needle to suit the thread and fabric.
18
4. The wrong presser foot is attached.
4. Select the correct presser foot.
–
5. The needle clamp screw is loose.
5. Use the screwdriver to tighten the screw.
18
6. The presser foot is not appropriate for the type of stitch
that you sew.
6. Attach appropriate presser foot for the type of stitch that you sew.
–
7. The upper thread tension too tight.
7. Loosen the upper thread tension.
23
Loose stitches
1. The machine is not correctly threaded.
1. Check the threading and rethread.
16
2. The bobbin case is not threaded correctly.
2. Thread the bobbin case as illustrated.
13