Upper
thread
breaks
Troubleshooting guide
PROBLEM CAUSE CORRECTION
1. The machine is not threaded correctly.
2. The thread tension is too tight.
3. The thread is too thick for the needle.
4. The needle is not inserted correctly.
5. The thread is round wound the spool
holder pin.
6. The needle is damaged.
1. Rethread machine.
2. Reduce the thread tension (lower
number).
3. Select a larger needle.
4. Remove and reinsert the needle
(at side towards the back).
5. Remove the reel and wind thread
onto reel.
6. Replace the needle.
Lower
thread
breaks
1. The bobbin case is not inserted
correctly.
2. The bobbin case is not correctly
threaded.
3. The lower thread tension is too tight.
1. Remove and reinsert the bobbin
case and pull on the thread. The
thread should pull easily.
2. Check both bobbin and bobbin
case.
3. Loosen lower thread tension as
described.
Skipped
stitches
1. The needle is not inserted correctly.
2. The needle is damaged.
3. The wrong size needle has been used.
4. The foot is not attached correctly.
1. Remove and reinsert needle (at
side towards the back).
2. Insert a new needle.
3. Choose a needle to suit the thread
and fabric.
4. Check and attach correctly.
Needle
breaks
1. The needle is damaged.
2. The needle is not correctly inserted.
3. Wrong needle size for the fabric.
4. The wrong foot is attached.
1. Insert a new needle.
2. Insert the needle correctly (at
size towards the back).
3. Choose a needle to suit the thread
and fabric.
4. Select the correct foot.
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