Sears Craftsman 1/2 HP Garage Door (Not)Opener
I have a chain-drive Craftsman 1/2 HP Garage Door opener. It stopped about 12" from the floor this afternoon and the chain jumped off the sprocket. I put the chain back on and pressed the button - Jumped again. Put the chain on, pressed it once more. The sprocket scheered off. Is it worth fixing? How? What would have been causing the problem. There is nothing in the way of the door or the tracks. I even turned the up and down force controlst to normal.