Is my system is compatible with the Nest?

[iamRod]

Hi, I am wondering if my system is compatible with the Nest? I have used the compatibility app and it sent me here.  I only have a C wire and a R wire at my thermostat block. I'm trying to replace a  Pro 1  T955WH    The thermostat from my utility has a no return policy if the box is open. 

Any help would be greatly appreciated.  Thanks!

[kiltguy2112]

There is most likley more wires inside the wall. If you reinstall the old tstat, that module in the bsement will show you what wires are being used by your system. The one in the pictures is wireless, and is currently wired to only provide power to the tstat. You may wind up needing a Nest power connect, but it is hard to tell without knowing what wires are being used and what wires are availible.

[iamRod]

Thank you for the advice. I will dig deeper.