@Alim, When you perform a Factory Reset of the Nest Thermostat is essentially new out of the box. You must perform the same steps as the beginning. When the Nest OS reaches the part where it directed you to download the APP, just select CONTINUE. The nest will display the code to add it to your APP. You will need to first delete the thermostat from your app. This will allow you to add the Nest again.
AC Cooling Wizard
NestPro, Google Pro, Mechanical Engineer and HVAC service company owner.
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