Garage Door Opener remote problem
Craftsman Gagage Door Opener from 1999, model 139.53662SRT2. Have 2 remotes, they have always worked and then one day one of them was not working. I tried to re-program it according to instructions and it will not add it. I tried to erase all codes on the unit and add the two remotes. It will only add the first one. I have tried it many times and either remote will work but only one of them at a time. That makes me think both of the remotes are ok so I am hesitant to go buy a new one.
I did read some other postings and seems like someone else had this problem but I could not find a stated resolution.
Any input is greatly apprciated as I called 1800 numbers for Sears and Craftsman and they flat out won't help because the product is greater than 90 days old.