Hello @Markmorris
Thanks for reaching out to our Nest Community. I'm here to help you with this N261 code on your Nest Thermostat. Don't worry, help is here.
I completely understand this situation. Let me lend you a hand to find the solution.
- I want to start by asking you what Nest Thermostat model you have.
- Are all the wires of your thermostat seated firmly in its terminals?
- Do you have a "C" wired?
- When did the issue first occur?
With these details, we can have a clearer idea of the reason for this situation.
Feel free to keep posting, and we'll work to find a solution for you.
Best regards,
Douglas.
