I bought a Wifi Thermostat but my old thermostat did not have a Common Wire. I can't use any of the swapping the G for the C solutions because I have an electric heater. I was told by Honeywell that I needed to run a new wire from the "C" terminal on the HVAC to the thermostat, but there is nowhere on the HVAC that is labeled "C."
I've searched everywhere for an explanation but I haven't been able to find anything analogous to my situation. All the other diagrams or solutions I've seen indicate a "C" Terminal somewhere on the control unit, but there is nothing like that on mine.
I am assuming that I can piggy back off one of the connectors on the circuit board (below) to create the common wire, I'm just not sure exactly where I should do it.
Below is the wiring to/from the thermostat, the twisted blue/brown/black wires are extras that were run through the wall but don't connect on either end. The thicker wires are the ones coming from the control panel which are then connected to the thinner wires running to the thermostat via the wire connectors.
Can anyone tell me where would be best to connect the new Common Wire or if it is even possible?
P.S. I can take more pictures of the actual wiring if it helps. Just let me know what section would be helpful to see.