Hi all, hoping you can help.
I have a smartthings hub that has been working for a while. However, when I try to add a new honeywell z-wave thermostat, it tells me it cannot add it.
All my existing thermostats are reading and the hub displays as connected.
Stranger than this, I reset an existing thermostat so I can troubleshoot. I then tried to add it back to the hub, but got the same error.
What could be the cause?