Chamberlain Garage Door Battery Backup Beeping. If your garage door opener with a battery backup is beeping it is usually to inform you about your battery back or similar issues. Commonly, the garage door opener is programmed to beep either every 30 seconds or every 2 seconds depending on the issue.
Another reason your garage door opener is beeping may be that the battery for your backup is running low. It started to beep last night and the remote keypad would not work. If you’re confused as to where to look on your garage door opener, check out the liftmaster® video below.