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Has anyone turned on this setting?
The manual states
"If enabled, the thermostat will cycle down from the higher stages so that as it approaches set point it will only be running in
stage 1. The thermostat calculates which stage to start the HVAC equipment in depending on the indoor and set point
temperature delta. As the stage 1 temperature delta is exceeded, the second stage will engage. Once the equipment
has brought the current temperature back to within the heat or cool differential setting, stage 2 will disengage and stage 1 will remain running until the set point is reached."
Stage 1 runs until the thermostat realizes that the desired temp is never going to be reached, Stage 2 kicks in, then Stage 2 turns off and lets Stage 1 finish off the job.
I've switched to this mode temporarily to see if I like it better than the default behavior of calling for W2 based on time.