Long story short. Furnace turned off, fiddled with it and power on. Nest thermostat read no power prior to furnace not working. Couldn't get app to work with nest thermostat. Factory reset, reset apps etc. Starting over, nest app setup throws me to Google home app. Once I scan I get, something went wrong, try again or use pairing code. 11 to 21 number code which the nest thermostat doesn't have. Back of unit has a 6 digit code (WSX6ST example) I'm lost as I can't get it to work from scratch.
