I have a double car garage but one of the garage doors won't work with the remote, on top of that the outside keypad won't work for that door either (it works for the other one fine, and did work previously, but now doesn't recognize the password). So two problems, i need to get the password working so i can manually enter on the outside keypad to open the door, and secondly i need to get my remote working for that door. The other door and remote work fine, i have changed the baterry on the outside keypad also, and it lights up. i also changed the battery on the remote. The previous owners said they never used them, it's a 2001 home.

You did not indicate th model number for specific information.

But here are generic infomration for remotes and keyless remotes.

http://www.chamberlain-diy.com/diy04/faq/0,1341,uid-fGNmbmFgZ2ZnaA==_610,00.html

Thanks, but the link is dead, it's a Craftsman 1/2 HP

That link is good, but there is something flaky about the site, Often you need to try it several times.

But here is a another link.

http://www.liftmaster.com/consumerweb/service/faq/faqlanding.htm

Chamberlain make the Sears, Chamberlain, Liftmaster units and they all work the same.

"it's a Craftsman 1/2 HP"

That is not a model number.

The model number will be in the form of 139.5xxxx