Sears Garage Door Opener
Model #139.53674SRT2. Was working fine. Went out this morning and it opened fine. When I closed it, it went down all the way then came up about 6 inches. When I close it, it closes hard and the rail bends and it reverses and opens about 6 inches. I have adjusted the down limit clockwise several times and it does the same thing.
Any ideas? The openeris 13 years old.