I installed a Nest 3rd Gen to replace my Ruud 7 cable system (G, R, B,
Y, W2, X, E). The thermostat says is heating but it does not.R to RG to
GB to OB Y to Y1X to CW2 to W2/Aux*E to ?* I ended up combining E & W2
and placed them in the W2/Aux termin...