I opened up the panel in the furnace to see what the wiring looked like before I attempted the install - see photo. On the thermostat side I only have red, yellow, white and green. No common “C” wire visible. Two questions:
Why do I have two wires - red and yellow - into my yellow terminal? Do I leave the red one there if I need the c wire adapter?
Since it looks like I have a common wire shouldn’t I see that at the thermostat? I guess it could be in the wall unused?
I have watched the install videos I just want to make sure I know what I am doing.
It’s been fairly common that a currently unused at the thermostat wire, in this case your C wire is either wrapped around the cable inside the wall (ideally) or cut off right at the insulation sheath. If you have any slack behind your existing thermostat, I would look carefully to see if it’s there and you can get enough to wire the Wyze. I’m not sure about your yellow and red in the same terminal.
The common and red Y wire go to your AC compressor outside.
The Red R wire, Green G wire, Yellow Y wire, and White W wire go to your thermostat.
To hook up the wyze, use the C adapter with the wires that go to the thermostat. Leave the red Y and white common on the furnace board.
