Never pull the fabric and never force the handwheel. Both drag the thread nest tighter around the hook, and forcing the wheel against a jam is a common way to knock a machine out of timing.
The method, in order.
Raise the presser foot and cut the top thread above the fabric. This releases the tension holding everything together.
Lift the fabric away if it comes freely. If it does not, snip the threads underneath through the needle plate hole rather than pulling.
Remove the needle, so nothing catches while you work.
Remove the needle plate. On most machines this is one or two screws. This is the step people skip, and it is the step that makes the job easy — almost all the jammed thread is underneath, out of sight.
Take out the bobbin case if it lifts out. On a drop-in bobbin it usually does; on a front-loading machine the case comes out with a latch.
Pick the thread out with tweezers, working the loose ends free first. Cut the nest into sections rather than pulling one long tail through the hook.
Turn the handwheel gently by hand as you go — it will start to move once the obstruction is out.
Then clean the race properly before reassembling, and check the hook and plate for scoring.
Then work out the cause. A nest under the fabric is a top thread problem: re-thread with the presser foot raised so the thread seats in the tension discs, and hold both tails for the first stitches.
Questions people actually ask
Should I use scissors inside the machine?
Small snips to release a nest, yes, carefully. Never lever with them against the hook — a scratched hook shreds thread afterwards.
It jammed again straight after.
The cause was not fixed. Re-thread completely with the foot up, fit a new needle, and check the bobbin is the right class and correctly seated.
Last reviewed 2026-08-11