((IRL: Got it working, stupidist fix ever... unplugged the two two-wire plugs going to the valve, and somehow, that fixed the issue. Right away, heard water moving through the pipe and within a couple hours, the temps were climbing on my floor of the house! Victory!! It was back up to 70F after only a few hours, and it's cycling like it should... and I think I found the issue... the automated valve is loose enough that when it moves, it twists itself about half an inch either way... gonna have to take a look at that because that's what worked the wires loose, I'm willing to bet.))