If you did what you claim “set up” the Nest thermostat manually, you must not have used a C wire. Here is what you should do. First, remove the Nest display off the base, turn it over, and connect a USB cable and charger to the display for 24 hours. Then, reattach your display. Go to SETTINGs > Nest App and it will display a PIN. Open the app and add the thermostat. It will ask you to scan a QR code, just tap the skip at the bottom left. And choose enter PIN code. The QR code only tells the app what model thermostat you have. The PIN code is unique and the app will use that the communicate with BLE to complete the installation registration with the Nest APP. If you have configured the Network the thermostat will link seamlessly to the Nest APP over the Internet. If have not set up the Network, it ask you to do that in the next step.
Did you perform the Heating and Cooling tests to verify your system was working properly? Had you followed the Nest installation process you would not have to be redoing these steps or be trying to figure out where the Neat Thermostat is in its installation and configured process.
Now, alternatively, you can factory RESET the thermostat and restart the installation and configuration process.
the AC Cooling Wizard
NestPro, Google Pro, Mechanical Engineer and HVAC service company owner.
