our old thermostat had these wires:
I set up the Nest thermostat and connected the white wire to W and red wire to R.
I get an N260 error that the power supply is not sufficient (but the thermostat for now works). It says that I need a C wire.
Do I need to do something like what the black wire in the old thermostat did?
Sorry for the late reply. I wanted to follow up and ensure you are good to go. Please let me know if you are still having any trouble from here, as I would be happy to take a closer look and assist you further.
I want to ensure you are good to go, and everything is working properly. Please let me know if you are still having trouble, as I will be locking the thread in 24 hours due to inactivity.