01-20-2022 08:05 AM - edited 01-20-2022 08:11 AM
01-26-2022 10:40 PM
Hey elizabethd,
Thanks for the photo and for reaching out to the Google Nest Community.
It seems that you have a proprietary system which I'm afraid is not compatible with our Nest thermostats. However, some proprietary systems can be rewired by a pro installer to be compatible.
Check out this link to know more about Nest thermostat compatibility: https://bit.ly/39HgVRW
Best,
Melba