Hello Uconnoshea,
It's nice to see you consulting on your system compatibility with the Nest Thermostat here in the Google Nest Community Forum! I'd love to check this out for you.
Can you share with us a photo of your existing thermostat's wiring? Also, tell us the make and model of your HVAC system and from what country are you posting?
I'll look forward to your response.
Regards,
Mark
