No snowflake on nest

[amiepollack]

We have the “flame” for heat. But no snowflake for AC. We do have a C blue wire connected.   What could be wrong?

[Markjosephp]

Hello amiepollack,

Thanks for reaching out to the Google Nest Community Forum. I'd be happy to take a look at this for you.

Incorrect wiring setup might be the reason for not showing the Cooling mode. Please check your thermostat's wiring and ensure that the wire in the Y/Y1 terminal is correctly inserted and the tab is pushed down. You can try reseating them to make sure they are properly connected. Also, share with us a photo of your thermostat's wiring to check how the wires are labeled.

Let me know how it goes.

Regards,
Mark

[amiepollack]

Thank you. I looked at the wiring and we don’t have a yellow wire.  Just blue, green, red and white. 

[Markjosephp]

Hi there,

Gotcha! Thanks for the update and for checking it out. If you have an AC unit that is compatible with your HVAC system as a whole, you can try checking your system's control panel to see if there's a designated wire for your AC that you can use to connect to your thermostat.

Feel free to let us know if you have more questions in mind.

Regards,
Mark