it was built by Chamberlain, if that helps you

there website is he
http://www.chamberlain-diy.com/diy04/home/




"Old_boat" wrote in message
.. .
I just bought a house that has a Sears/Craftsman Garage door opener model
139.536006. The light on the unit will not turn off. Any one have a service
manual or know what would cause this. I did not get an owners manual with
it.

Thanks,

Larry