Original nest thermostat flagged as not compatible

[dashman]

I've got a single stage heating and cooling system - 24V AC thermostat and solid wires.

These pins are wired on my current thermostat

W RH RC C G and Y

This is the original Nest thermostat - any help appreciated.

[EdmondB]

Hello dashman, 

Thanks for posting here in the Community. To determine compatibility, could you please share a photo of the wiring configuration on your current thermostat? We also need to verify the make and model of your heating and cooling system. 

I look forward to your response.

Best,
Edmond