On May 19, 9:22*pm, "HeyBub" wrote:
James wrote:
This is a Craftsman unit, about 12 years old. *It uses the chain, but
has worked fine.

Today, the door would not go up and down. *The unit buzzes (loud)
like the motor is trying to run, but the chain does not move. * *Can
unhook the door from the chain, and run it up and down manually, but
the drive motor seems to be buzzing and not functioning properly.

Is the a home repair, or more likely a worn out unit needing
replacing ?

Thanks

James

This model may have nylon gears - and they often get stripped. A new set of
gears is cheap and easy for the homeowner to replace.

Heybub is the winner...to the point and nearly precise! I am a
mechanic (almost) and this is NOT the easiest job.
I think the gear set was 20 or $25.
And Sears' openers are Chamberlain...and NOT a crappy opener!