To cut to the chase, my Lennox thermostat died and I replaced it with a Honeywell, which works with their TCC app and Total Comfort Connect website. Both the app and website are a bit clunky, but they work, and they're better than the Lennox solution that the post originally discussed.
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Some info in an old blog post
You might want to read my absolutely ancient blog post on this topic.
To cut to the chase, my Lennox thermostat died and I replaced it with a Honeywell, which works with their TCC app and Total Comfort Connect website. Both the app and website are a bit clunky, but they work, and they're better than the Lennox solution that the post originally discussed.