Hi all. Terrible time for this to happen, as I’m selling my home and today is the open house, and it’s 20 degrees outside! Ha, anyway, nest is orange and says fan is running and it’s heating but nothing is coming out of vents. I can hear furnace kicking on, then It shuts off. I had the fan replaced in my furnace last week and It has been running fine since then. Also, has the nest for two years and have had no issues until now. I have natural gas, forced hot air, if that matters. Thanks for any assistance.