Troubleshooting - Singer HEAVY DUTY 4423 Manual

Troubleshooting

If you feel uncomfortable or unsure, reach out to a staff
Problem
Upper thread
breaks
Lower thread
breaks
Skipped stitches
Needle breaks
Loose stitches
26
member for help!
Cause
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 wound around the spool
holder pin.
6. The needle is damaged.
1. The bobbin case is not inserted
correctly.
2. The bobbin case is threaded wrong.
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. 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. The machine is not correctly threaded.
2. The bobbin case is not correctly
threaded.
3. Needle/ fabric/ thread combination is
wrong.
4. Thread tension wrong.
Correction
1. Re-thread the machine.
2. Reduce the thread tension. (lower
number)
3. Select a larger needle.
4. Remove and reinsert the needle. (flat
side towards the back)
5. Remove the reel and wind thread onto
reel.
6. Replace the needle.
1. Remove and reinsert the bobbin case
and pull on the thread.
The thread should pull easily.
2. Check both bobbin and bobbin case.
1. Remove and reinsert needle. (flat side
towards the back)
2. Insert a new needle.
3. Choose a needle to suit the thread and
fabric.
4. Check and attach correctly.
1. Insert a new needle.
2. Insert the needle correctly. (flat side
towards the back)
3. Choose a needle to suit the thread and
fabric.
4. Select the correct foot.
1. Check the threading.
2. Thread the bobbin case as illustrated.
3. The needle size must suit the fabric and
thread.
4. Correct the thread tension.