What if my wifi is not working but my power is on. Will the furnace and AC still heat and or cool?
Sometimes my wifi just quits.. problem not mine but at the telephone company.. it might be down for an hour.. will I lose control of my heating or cooling or can I manually adjust what is necessary? There is not and issue with power... just wifi
You can still walk up to the Nest and control it manually, yes. You click the screen to get to any of the available menus (if you want to switch from heat to cool, etc) and turn the silver ring (it's a dial) to adjust temperature or navigate menus.
The only thing you lose if WiFi goes down is the ability to control the Nest from your phone out of your house or for it to track if you are home or if you've left.