Craftsman remotes will not work
I have a craftsman garage door opener model 139.53975SRT
1/2hr. It was working fine until a couple of weeks ago & now neither of the remotes will work besides to open it. I have lost the manual so I am looking for help here. In order to shut the garage now, I have to use the button that is hardwired and hold it down until the garage shuts completely.
When it began to not work properly with the remotes, it would shut partially and then go back up again. Now it will not shut at all.
Any ideas of what I can try?
Thanks in advance!