My original Lennox thermostat had 7 wires connected: Black to W, White
to W2, Blue to C, Yellow to Y, Green to G, Orange to O, and Red to R.
Unfortunately , I do not see an option to attach a photo to this reply.
Yes. So it turns out that the upstairs unit isn't dual fuel. It has a
heat pump with a secondary heat pump for alt heating. That being said,
my original Lennox thermostat had 7 wires connected (Black, White, Red,
Yellow, Blue, Green, and Orange). I n...
Thanks for the follow up. I took your advice and had your recommended
Onsite Tech professional come out a few days ago. The tech checked my
thermostat wiring / settings and didn't find any problems. He
recommended I have an HVAC tech come out and che...
