Hi Nbh5202,
Thanks for reaching out. To make sure the compatibility and wiring configuration of your system to the Nest Thermostats, we shouldn't only base on the standard color of the wires.
I'd like to know more about it. Could you please share the photo of the wires connected to your thermostat? Ensure that the labels of the wires are visible.
To send a photo, you can click this link then scroll down to your response and hit reply. Check for the camera icon or click the three horizontal dots to expand the toolbar. From there, you'll be able to reply and share a photo.
Also, you can visit this support article for more information.
Best,
Jenelyn
