Need help installing 3rd generation Nest Learning thermostat. Current
one has these wires: RH, B/C (blue wire), O, G, Y1, W1 and W2. I
understand all of them except how to connect the B/C and O wires? Pic in
comment section.
I hired a professional to come out and finish the setup. It was the C
wire. We have a dual heat thermostat so it got too tricky for me to
attempt. Thank you for your reply!