Ususally with a garbage disposal there Is something In there that will not allow the teeth Inside It to do there jjob . On the very bottom of the Garbage disposal there Is little hole In the middle of It where a hex key goes . One should be attached to the disposal . If not you can get one at a hardware store . Rotate the hex key at the bottom clockwise and counterclockwise both .
Then also there Is a tiny red button that you have to press , that Is the reset button . After that It should be back In working order .