Hello @TahirAbdul
Thanks for reaching out to our Nest community about this new installation. I'm so sorry for all the inconvenience. Don't worry, I'm here to help you with it.
Could you share with me a picture showing the actual wire on your thermostat? With this, I can determine the correct wiring configuration.
Also, you can check if your system is compatible on this page: Thermostat Compatibility.
Feel free to keep us posting with these details, and I will definitely do my best to find a solution for you.
Best regards,
Douglas.
