Hello Proeri83,
It's nice to see you reaching out here in the Google Nest Community Forum to discuss your system compatibility with the Nest Thermostat. I'd be glad to check this out for you.
To make sure, can you post a picture of your thermostat's wiring? From what country are you posting? Also, what's the make and model number of your HVAC system?
I'll look forward to your response.
Regards,
Mark
