Il semble que Google nie et noie le poisson en indiquant des mise à jour à faire... Ce qui impossible vu que le wifi est HS.
https://support.google.com/googlenest/t ... d=60628507
If you have a Nest thermostat that can't get online no matter what troubleshooting steps you take, you need to contact them for a replacement. A bad software update fried the wifi chip.