Background. The boiler is a buderus G205, oil burner.
Went to father in-laws house to test fire the boiler, checking for issues before the heating season. A problem I did find. Long story short, I have line power going into the (White Rodgers 8B48A) high limit switch, (looks like an aqua-stat to me) but no power coming out to burner. The water is cold and should be calling for heat. Before I just ordered the new switch, any other guess's? Power comes from emergency switch, to the limit switch, from there to burner and circ pump.