I have 3 furnaces and 3 Nest thermostats. The two upstairs switch between an N262 error or a No Power error. I was able to "reboot" a thermostat and get the furnace running but it quickly returned the no power error. Batteries are fresh, no C wire. Any suggestions? HVAC vendors are slammed around my neck of the woods and it's getting cold.
Thank you,
Hog
