Nest model E error code E194

[KiethC]

I've had my Nest installed for 1 year , yesterday got an Error E194 

The schedule is still running the furnace fired up at it's regular time this morning and seems to be running fine.

Any Idea what's going on ?

I've checked all the suggested things already. all seems fine 

[maedacortez]

Hi KiethC,

Thanks for reaching out. I understand you have error code E194 on your thermostat, which means the R wire connection isn't detected. I have some troubleshooting steps that might help. You can follow these steps by tapping on the link and visiting the Troubleshoot Nest Thermostat Help Codes page.

I hopes this helps!

Regards,

Manuel