If you haven't already, try a factory reset on the thermostat itself,
then remove it from the Nest app, and re-add it. That seems to have
fixed it for me but I've only done a few test runs today over the past
couple hours. Even if this fixed it, I'm ...
Nest Gen 3 display model 3.4 and since the update on 26 October, have
been experiencing short cycling with the furnace. Received error M6 as
the furnace turned on and off multiple times within 15 minutes. Tried a
factory reset just now and initially ...