Two wire (yellow and white) for Nest

[JungleCruiser]

I have an analog thermostat and wanting to install the Nest Thermostat. There is only a white and yellow that I see, but haven't looked to see if there are any other wires behind it. How do I get this installed with just the yellow and white, if there are no other wires?

[moralesvicente]

Hello JungleCruiser, 

Thanks for posting here in the community forum. It seems you're having some questions about wiring configurations in your Nest thermostat. Don't worry; I'm glad to assist you.

Please help me out by answering some questions to get a better understanding of the situation.

• What type of thermostat do you have? If you don't know, check out this article: How to Tell Which Nest Thermostat You Have.
• Could you attach a picture of your wiring system connected to your analog thermostat? 

Usually, this thermostat model needs to be connected with more wires, and it seems to be not compatible; however, I would like to double-check this information. Also, you can try to use this tool: Compatibility Checker. 

Keep me updated so I can provide you with more information.

Best regards, 

Daniel