If you are taking the time to read this thank you. I just recently bought a Insteon Remote Control Thermostat 2441TH. My current thermostat only has four wires however there is a blue unused wire on both ends. I am attaching pictures from the panel on both sides of the wire. What I am unsure about is which port would be the 24v common. I don't think I need the add a wire kit based on having the additional wire that is unused but I was hoping someone who knew more might help.
Thermostat:
Thermostat:
Comment