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This is a copy of my post on the Lyric support site:
"Additional observation: Just went around and dialed up each zone to call for heat. But just barely. Looked at my HZ432 zone controller and at least one of the zones was calling for stage two. But it wasn't the ecobee3 or either Nest. That leaves the Lyric. So adding to the insult of no information display is the injury of an absolutely unnecessary call for stage two. "
If anyone has any ideas about this, I'd appreciate it. I suppose I could pull the W2 wire, but because there is no user control, and no information displayed, I might do just as well to put the Smart Si back on that zone.