I have a pair of Insteon 2476D (V 5.4 1048) switches installed for about 3 years without any issues. The switches are linked to each other in a virtual 3-way setup to control one light. They are (or were) linked to Indigo also.
Now Indigo can not communicate with either device. I've tried factory resets on BOTH devices, but still no good. Oddly, the devices can talk to EACH OTHER, as I was able to make one switch a controller for the other after a factory reset of both.
Other Insteon devices in the home respond fine and I am able to link other Insteon controllers. I deleted one device ( a lamplinc) and re-added it to Indigo fine.
I can understand one device going bad, but 2 at the same time seems really odd.
Before I spend $100 to replace both switches does anyone have any good troubleshooting tips ? Note I think we can discount line noise as I have never had an issue like this before and the breaker panel was replaced also about 3 years ago.
Thanks