Machine Problems
Common Sewing Machine Problems: A Full List of Causes and Fixes
The short answer
Nearly every common sewing machine problem traces back to one of five causes: the needle, the threading, the bobbin, lint, or a setting. Work through those five before you suspect a broken part.
Last updated September 2026
What's covered9
Sewing machine problems tend to look worse than they are. A nest of thread, a row of skipped stitches or a needle that snaps can make a machine seem broken. But most of these come from a handful of small causes you can fix. This page lists the common sewing machine problems by symptom, with the likely cause and the fix.
That way you can find yours fast. It follows the same layout as New Mexico State University's checklist of common sewing machine problems. That is a useful printed reference.
Before you start: the five-point reset
Many problems go away after this reset. Do it first. Then test on scrap.
- Put in a new needle of the right type and size.
- Re-thread the top thread with the presser foot raised.
- Re-seat the bobbin, using the class your manual lists.
- Brush lint out of the feed dogs and bobbin area.
- Set the stitch, length and tension back to your manual's defaults.
Stitch problems
| Problem | Likely cause | Fix |
|---|---|---|
| Loops or a nest under the fabric | Top thread outside the tension discs | Re-thread with the foot up. See bobbin thread bunching |
| Bobbin thread shows on top | Top tension too tight | Lower the dial one step. See tension dial |
| Skipped stitches | Dull, bent or wrong needle | New needle matched to the fabric. See skipping stitches |
| Puckered seams | Tension too tight, stitch too long for fine fabric, dull needle | Lower tension, shorter stitch, fresh fine needle |
| Uneven stitch length | Pulling or holding back the fabric, lint on feed dogs | Guide the fabric without pulling, clean the feed dogs |
| Loose, weak stitches | Top tension too loose, or thread outside the discs | Re-thread, then raise the dial one step |
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The full guide to sewing machine problems with tension walks through the tension rows above step by step.
Thread problems
| Problem | Likely cause | Fix |
|---|---|---|
| Top thread breaks | Needle too small, tension too tight, burr, old thread | Larger needle, re-thread, fresh thread. See thread keeps breaking |
| Bobbin thread breaks | Bobbin wound too tight or unevenly, lint in the case | Rewind the bobbin at an even speed, clean the case |
| Thread shreds | Needle eye too small, nick in the needle plate | Topstitch or larger needle, check the plate |
| Thread catches at the spool | Wrong spool pin position or missing spool cap | Use the right pin and cap size |
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Bobbin problems
| Problem | Likely cause | Fix |
|---|---|---|
| Bobbin area jams | Bobbin backward, loose tails, lint | Clear the jam, re-seat the bobbin. See bobbin jamming |
| Machine will not pick up the bobbin thread | Needle in backward, top thread missing the take-up lever | Re-insert the needle, re-thread fully |
| Bobbin winds unevenly | Thread not through the bobbin winding guide | Follow the winding path in your manual |
| Bobbin tension seems off | Wrong bobbin class, thread missing the tension spring | Check the class, then read bobbin tension |
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Needle problems
| Problem | Likely cause | Fix |
|---|---|---|
| Needle breaks | Pulling fabric, sewing over pins, needle too fine for layers | Let the machine feed, remove pins, larger needle |
| Needle hits the presser foot | Wrong foot for the stitch, or a loose foot | Match the foot to the stitch width, tighten the foot |
| Needle will not move but the motor runs | Bobbin winder engaged or clutch knob loose | Disengage the winder, tighten the handwheel knob |
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Our sewing needle size chart helps you pick the right needle for each fabric.
Feeding problems
| Problem | Likely cause | Fix |
|---|---|---|
| Fabric will not move | Feed dogs lowered, presser foot up, stitch length at zero | Raise the feed dogs, lower the foot, set the length |
| Fabric pulled into the needle hole | Thin fabric, zigzag plate, needle too large | Hold the thread tails, use stabilizer, smaller needle |
| Layers shift and end unevenly | Top layer slows under the foot | Pin or clip more, use a walking foot |
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Noise and power problems
| Problem | Likely cause | Fix |
|---|---|---|
| Machine will not turn on | Cord or foot pedal not fully plugged in | Check both plugs, try another outlet |
| Loud clicking or knocking | Thread caught in the hook, bent needle | Stop, clear the bobbin area, new needle |
| Grinding, stiff handwheel | Dried oil, debris, worn part | Clean; if it continues, book a service |
| Burning smell or sparks | Electrical or motor fault | Unplug and take it to a technician |
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Sewing machine problems by machine type
Some problems show up more on certain designs. Knowing your type helps you read the manual faster.
| Machine type | Problems seen more often | What to check |
|---|---|---|
| Top drop-in bobbin | Loose stitches when the thread misses the slot in the bobbin holder | Pull the thread through the groove shown on the cover plate |
| Front-loading bobbin case | Jams when the case is not clicked fully into place | Re-seat the case until it latches |
| Mechanical (dial controls) | Feed dogs or stitch length left at odd settings | Reset the dials to the manual's defaults |
| Computerized | Error codes, needle stops in the wrong position | Read the error table in the manual, then restart the machine |
| Older all-metal machines | Stiff handwheel from dried oil, brittle wiring | Clean and oil the marked points, have the wiring checked |
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A computerized machine may show an error after a jam. It often clears once you remove the jam and switch the machine off and on again. If the code comes back, the manual's error table tells you whether it needs service.
When sewing machine problems need a professional
Home fixes cover most of the rows above. Take the machine to a shop in four cases. The first is skipped stitches that go on with a new needle, which points to timing. The second is grinding after cleaning. The third is anything electrical that seems wrong.
The fourth is a computerized machine with an error the manual can't clear. Our machine repair guide explains what a service includes. How to fix a sewing machine walks through the home checks in order. The sewing machine troubleshooting guide groups the remaining checks by symptom.
FAQ
What is the most common sewing machine problem?
Thread bunching or looping under the fabric is one of the most reported, and it usually comes from the top thread missing the tension discs. Re-threading with the presser foot raised fixes it in most cases.
Why does my sewing machine keep messing up?
Repeated problems usually mean one cause was missed: an old needle, a thread guide skipped during threading, the wrong bobbin, or lint under the needle plate. Change one thing at a time and test on scrap after each change.
How do I know if my sewing machine is broken?
Suspect a real fault when problems continue after a new needle, a full re-thread, a clean bobbin area and default settings, or when you hear grinding, smell burning, or the handwheel will not turn.