Thanks Biggles. Unfortunately, I'm struggling to understand your post:
"...the Rc-Rh are the hot 24V side of the system up there it would of shorted the transformer as soon as you connected it to Rc"
Does this mean if I jumper Rc and Rh I will damage the stat (or the transformer)?
"NOTE to others reading here always consider that C wire is required on newer digital stats with led screens without a true 24V and that C wire it will lite up and just sit there... "
I believe that the White Rogers does not use a 24v to power the stat but I don't really understand what the highlighted text means?