I have an old thermostat that has a single red wire serving the RC and RH connections. The wire was stripped such that it can wrap around the RC set before terminating on RH. The other wires are G, Y, and W. The air is a different unit from the forced hot air (gas) so I assume that would mean its a dual transformer system. I have a Nest model G4CVZ can i just use the single RED connection in this set-up and the Nest is smart enough to bridge both the heat and air? Or do I need to retrofit this to have a C wire?
Sorry for the late reply. I wanted to follow up and ensure you are good to go. Please let me know if you are still having any trouble from here, as I would be happy to take a closer look and assist you further.
I want to ensure you are good to go, and everything is working properly. Please let me know if you are still having trouble, as I will be locking the thread in 24 hours due to inactivity.
It has been a few days since the last reply, and I am going to lock the thread at this time. If you have any questions, please feel free to create a new post.
