04-10-2008, 12:06 AM
After coding the newer remote, a 3 button Chamberlain Security +, I test-ran the Chamberlain/LiftMaster garage opener several times and everything worked as it should. The original LiftMaster Security + remote control worked as well. Then today, the latter wouldn't not open the garage door at all. Dead silence. It wasn't the battery. The garage has no side door. We would have to break one of the side glass windows. S/O has the other remote with her at work 60 miles away. I didn't try to open the garage door with brute force ... um, manually ... yet. My question: Is it possible that I decoded the original remote when coded the newer one hence now the problem?