Critical error code e294 is displayed when your Nest thermostat's wiring should be reconfigured

[Alixx]

Follow-up to @BruceB: As you suggested, I did a factory reset, connected all wires, but refrained from telling Google Home about the blue (common) wire, and completed the setup. Works fine!

https://www.googlenestcommunity.com/t5/Nest-Thermostats/Nest-thermostat-with-e294-error-R-wire-not-d...

[Jenelyn_O]

Hi Alixx,

Thanks for reaching out and for sharing the steps you've exhausted to setup your Nest Thermostat 2020 successfully. I'm glad to hear that it is working fine. Please feel free to let us know if you have questions or concerns, as we'll be willing to assist you. 

Best,

Jenelyn