Hello all! New user here. I have a Lennox system with 2 SLP98UH070XV36B-07 Furnaces and 2 XC25-024-230-02 AC Units. The two zones in the house are wired to iComfort WI-Fi touchscreen thermostats. One of the thermostats broke and it is not covered under warranty. When I tried to replace it I found out that this discontinued thermostat is over $700 and the new model over $1,000. That killed Lennox for me but, since the heaters and ac units are still chugging along, I want to replace the thermostats with Nest or Ecobee. When I called Lennox to ask if I can do this, the guy told me they will not work and I have to re-wire many things.
Now, I don’t trust these people, and I understand that there is a way that I can do this “re-wiring” because it is not too complicated. A friend sent me here to ask, so hopefully, someone can give me a hand.
I found this topic Lennox furnace with ecobee3 (or nest) - Devices & Integrations - SmartThings Community, but it is from 2018, so not sure if it still applies.