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I am still confused, the "C" terminal now has a wire connected to it; am I to also connect the "T" wire? the new t'stat does have a "C" terminal and an "X" terminal. Still am at a loss.
T is for an anticipator , you won't use it on a digital stat.
Trane and sometimes York used B as common,
Trane used X2 for aux heat.
Any other questions please reply back.