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