My Nest hasn't been the same this year. Turns out the May 22 update is
what is causing the issue and the C wire needs to be put in. Pull that
face plate off and follow these steps.If that fails too, do yourself a
favor and look at this Ecobee alterna...
Even with the C wire plugged in, the Nest is still been finicky with the
May 22 update and my furnace. I gave up and bought an Ecobee to replace
it, have not regretted it.
