I am looking to upgrade from an old analog tstat to a Nest. My old stat had only two wires connected (R and W) but the wire bundle had three. So I tried connecting the green wire to C and then turned the power on. Nothing happened, so I switched the green and white just to make sure it was the wire that was the issue. Still nothing. I will admit that I’m a novice, but I really thought this would work. What am I missing?
Heater is a Goodwin.