Odds are you can find what you need to know he

http://www.residential-openers.com/codin.html

or else by using google. You don't give us the model number, and I
don't have ESP, so it's up to you now...


wrote:
I have a 9 yr. old Sears opener that is giving me fits. I can't
program both remotes to work at the same time. Each will work, but
not at the same time. What am I doing wrong???
Thanks
Fred