Hi Ripster10,
Thanks for posting in the Google Nest Community forum. I'm sorry for the delay. I'd like to take a closer look at it to ensure the compatibility and wiring configuration of your system to the Nest Thermostats. Please take a photo of the wires connected to your HVAC control board. Ensure that the labels of the wires are visible. Also, provide your system's make and model.
Best,
Jenelyn
