mobilehomerepair.com

I hope I'm in the right forum. I'm trying to install a smart thermostat. Last month I had to have a repair to the old Coleman furnace and the technician said I have the necessary "C" wire. However, my old thermostat which is digital doesn't have a "C" terminal. I know "C" wires are often blue and the only blue wire is attached to the "Rc" terminal. Do you all know if that would be the "C" wire? I cannot find any information online for this.

Oh well I've just gotten off the phone with Honeywell and even after video chatting with them so they can see the inside of the furnace they were still unable to help because we couldn't see which wires correspond with the ones attached to the thermostat. So suggested that I hire an HVAC tech install it. So I've contacted someone I used recently hopefully they won't be too expensive.