OOps sorry wrong advice happened to my other singer. I do have a 401. Check your manual. Does it have thread in the needle? If so the thread maybe caught in bobbin case on some lint. May be all needs is cleaning. I love my 401. Got it at an estate sale. D
Originally Posted by
tessagin
Mine did that yesterday. Pull the square plastic cover over the bobbin case and raise the presser foot. If you have your manual check the trouble shooting page. You don't want to force the wheel. mine had thread caught.