We may have found other answers which could help you.
Click here for Control Day Heat
the thread is bunching on underside of fabric it looks like birdnest?
What size needles can I use for my Singer 39a3?
Presser foot is loose?
Singer 188K1 presser bar stuck?
My CG 500/550 Singer Sewing Machine's bobbin isn't working?
Bobbin won't wind?