so this is how i normally wire them.
black wire.. transformer gets powered after limit
black and yellow. to L1
brown N/C.. removed
red.. to hot side of blower.
now when there is a flue damper involved.. i would be lost. if someone could offer me help it would be nice.
Automatic flue dampers are pretty scary. Even with a spill switch and an end switch, I still wouldn't sleep aa wink.
Scary yea. If it is a furnce with a flue damper, probally needs to be inspected. Might be rather old.