Correct you can, but I think you need C to come from the air handler. You don’t have that so you would need to run another wire. There is a schematic that Wyze has been giving out to use the c wire adapter for dual transformer but it didn’t work for me
I didnt expect it to be easy. She had the central air installed a few years ago and they cheated their way around… the attic unit is connected to the light switch that controls the attic light so I’ve got to run wires anyways.
And for funsies, the attic light switch used to be the living room light switch so its right next to the hall light switch. Fixing that so people stop shutting off the AC by accident is my main goal.
That’s kind of you then. It will be nice to clean up that wall too. I just hope the new thermostat is reliable. Good luck.
Edit: what’s already a little crazy is the Honeywell on the left ALREADY has heat/cool capability. The AC guys could and should have moved the wires then! You should probably try it now before you even order a new unit, just in case there is something even crazier going on…
I need to do more digging.
She wants to keep the circuit for the AC off when not in use so I cant run C wire from there, and it doesnt appear I can run it from the furnace either. (Photo attached) and at first glance I cant use external either because it will occupy RH and RC.