Recently this started occurring although infrequently, where the garage door will open without any known input. The garage door opener is equipped with the Insteon I/O Module (aka IOLinc) 2450 for sense and open/close functions. 18-year-old Genie GDO with Intellicode. My eISY programs related to the garage door consist of SMS open/close event notifications. Troubleshooting so far consisted of factory resetting the GDO to remove all stored remotes, after which the problem again occurred.
To make it more interesting I also have an Insteon Siren 2868-222 plugged in on the second floor where at some point I had it integrated with a Z-wave Fortrezz IO Interface module to chime upstairs if someone rang the doorbell. The eISY program at the time made use of the chime sound and not the siren sound. The siren has remained plugged in but the Fortrezz module is not connected to the doorbell transformer.
Now, a couple of times that the GDO has opened on its own, the Insteon Siren has also simultaneously sounded the burglar alarm (not the innocuous chime).
Has anyone had a similar experience? The eISY log was inconclusive, and when I checked the event viewer, the events at the specific time had aged out, so no help there.