No C Wire. With having 24+ volts on the red wire, the C Wire shouldn't
be needed. It wasn't needed on my old house where I installed 5 of
these. That was on a Taco controller. This is a new house for me,
voltage is voltage... or should be.
Appears I'm having the same problem. I've installed many of these in the
past, but this one just doesn't appear to be charging (on the mount or
via USB). I've tested voltage from the red wire. 24+ Volts. That should
be more than enough to charge (and...