TroubleShooting

       
     
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This is a "basic" troubleshooting guide that applies to a majority of machines. If your machine problem or solution isn't listed here, please refer to the owner's manual. We will be posting the original troubleshooting pages for the models we have available. Please return to the Repair page available models.

     
 

 
                 
 

 
     

Problem

Possible Cause Solution
 

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        Sewing machine suddenly stops during sewing   Sewing machine has been run at a low speed for an extended period of time. To prevent overheating, motor power will automatically turn off   Turn machine off for 20-30 minutes and the safety device will reset. Then you can continue sewing  
 

 
     
 

 
     
 

             
      Needle will not move 1) Upper thread has run out. 1) Thread machine.
      2) Presser foot is up 2) Lower presser foot
      3) Bobbin winder shaft was left in winding position.  3) Move bobbin winder shaft back.
     
      4) Buttonhole lever was not lowered when machine was placed in buttonhole mode. 4) Lower buttonhole lever
     
                 
      Machine won't run 1) Wrong Presser foot and the needle hits the foot 1) Change presser foot
     
      2) Needle has come loose and is stuck in the hook  2) Remove needle and install new one.
     
                 
      Upper thread breaks 1) Threading is not correct 1) Check Threading 
      2) Thread has a knot in it 2) Re-Thread Machine
      3) Thread tension is too tight 3) Correct thread tension
      4) Needle is bent, burred or has a sharp eye 4) Replace needle
     
      5) Needle is wrong size 5) Check needle size, replace if necessary
     
      6) Needle has been inserted wrong 6) Properly insert needle
     
      7) Thread take-up lever has not been threaded 7) Check threading
     
                 
      Bobbin thread breaks 1) Bobbin has not been fully inserted in bobbin case 1) Check bobbin case
     
      2) Bobbin has been incorrectly threaded 2) Correctly thread bobbin case
     
      3) Bobbin does not turn smoothly in bobbin case 3) Check if bobbin has been wound evenly
     
      4) Lint in bobbin case or shuttle 4) Clean bobbin case and shuttle
     
                 
      Skipped Stitches 1) Thread tension is too tight 1) Correct thread tension
      2) Needle is bent or burred 2) Replace needle
      3) Needle is wrong size 3) Check needle size
      4) Needle and thread does not match 4) Use proper thread or needle
     
      5) Thread take-up lever has not been threaded 5) Check threading
     
      6) Light pressure on presser foot 6) Increase foot pressure 
     
      7) Incorrect setting of needle 7) Check needle setting
                 
      Stitches not properly formed 1) Thread has not been pulled into thread sensor guide 1) Fully pull thread into thread sensor guide
     
      2) Threading is not correct 2) Check threading
      3) Bobbin case has been threaded wrong 3) Check bobbin case threading
     
      4) Spool cap is wrong size for thread spool 4) Replace the cap with correct size
     
                 
      Irregular Stitches 1) Incorrect size needle 1) Choose correct size needle for thread and fabric
     
     
      2) Improper threading 2) Check Threading
      3) Loose upper thread tension 3) Tighten upper thread tension
     
      4) Operator Pulling on fabric 4) Do not pull fabric guide it gently!
     
      5) Light pressure on presser foot 5) Increase pressure on presser foot
     
      6) Loose presser foot 6) Reset presser foot
      7) Unevenly wound bobbin 7) Check bobbin
                 
      Fabric Puckers 1) Stitch length is too long for material 1) Decrease stitch length
     
      2) Needle point is burred 2) Replace needle
      3) Incorrect thread tension 3) Check thread tension
      4) Light pressure on presser foot 4) Increase pressure on presser foot
     
      5) Fabric is too sheer or soft 5) Use underlay of tissue paper or pellon
     
      6) Using two different sizes or kinds of thread 6) Upper thread and bobbin thread should be the same size and kind
     
     
                 
      Thread Bunches Up 1) Upper and lower threads not drawn back under presser foot 1) Draw both threads back under presser foot
     
     
      2) Feed Dogs are down 2) Check feed dogs. Raise or adjust
     
                 
      Needle Breaking 1) Using to thin of a needle was  for sewing a heavy weight material 1) Check Needle Size
     
     
      2) Needle has not been fully inserted into needle bar 2) Check needle
     
      3) Needle clamp screw is loose  3) Check needle clamp screw and tighten
     
      4) Presser foot is not correct one 4) Check presser foot
     
      5) Presser foot is loose 5) Reset presser foot
      6) Pulling on fabric as you sew 6) Do not pull on fabric! guide it gently
     
                 
      Loud noise-Knocking noise-Machine Jammed 1) Dust/Lint in the feed dogs 1) Clean machine
      2) Lint in the hook 2) Clean machine
      3) Thread caught in the hook 3) Disassemble hook and clean
     
                 
      Machine Does not feed fabric 1) Stitch length is set to zero 1) Check stitch length and pattern
     
      2) Pressure on presser foot is set too low 2) Check pressure setting on foot
     
      3) Feed dogs are lowered 3) Raise feed dogs
      4) Threads are knotted under fabric 4) Place both threads back under presser foot before beginning to sew
     
     
                 
      Threading cannot be done Needle is not in the highest position Turn handwheel until needle is in proper position
     
     
      Needle threader will not turn Needle threader is designed not to turn! To protect itself if needle is not up Check needle position
     
     
      Threading hook won't enter the needle eye Needle is not fully inserted into needle bar Check needle
     
      The threading hook is left in the needle eye Sewing machine was accidentally started while threading hook was still in needle eye  Slightly turn handle clockwise and remove threader.
     
     
                 
     

We hope this troubleshooting guide helps to solve any problems you might have with your machine not operating correctly. Remember to check our Repair page for troubleshooting guides special for your machine and manufacturer. And visit our threading page for any threading questions you might have.

We wish you lots of luck and many stitches with your machine!  Sewusa