E448 error message

[Cstier]

Our old thermostat was working smoothly before we began the installation of our new Nest. We installed the Nest using W and R wires. When we turn the power back on, the app returns the E448 error message. We have tried resecuring the wire several times and tried both the Rh and Rc inputs but we get the same error each time. Our baseboard heaters kick on every time we turn the power back on and the Nest screen illuminates. Any guidance?

[kcruzgonzalez]

Hi Cstier,

Thank you for posting in the community. Thank you for providing that detailed information about the E448 error you're encountering with your new Nest thermostat installation. Let's work together to find a solution.

To give you the most accurate assistance, could you please provide photos of your past and current wiring? This will allow us to compare and identify any potential issues.

You should find a camera icon or "Insert photos" option to attach the images. If you don't see this on your mobile device, please try using a different browser or a computer.

We look forward to your response and the photos.

Best regards,

Kevin