UPDATE: they downgraded one of my thermostats (without telling me they
were doing so) and it fixed my problem. I installed the third thermostat
and did a factory reset and it worked. So my system is now stable once
again but I spent lots of money and...
My two Nest thermostats stopped turning the furnace after they were
automatically upgraded to 6.2-22. At first I thought it was one of the
Thermostats (before I realized they were both having a similar issue),
so I purchased a new one. It had the sam...