You are not alone with this problem. Check out this thread:
https://www.googlenestcommunity.com/t5/Nest-Thermostats/Nest-Thermostat-Suddenly-can-t-find-ANY-wifi-network-Are/m-p/87720/emcs_t/S2h8ZW1haWx8dG9waWNfc3Vic2NyaXB0aW9ufEtZTTEyUlkzTjlHVFBEfDg3...
Hey, add me to the list. Mine crapped out yesterday and after an hour
with Nest Support, I was told that nothing could be done since it was
past the warranty period. Then the CSR had the gall to try to sell me
the cheaper version for only $129 or a r...
