Thanks for that! I can see the limit switch on my spare III way in there so it looks like an all day job to get at it. :( I was hoping it was one of those things out front. Drat.
Looks like I have to take out the II from under the fridge. Might be easier to just swap in the whole III once the II is out anyway. At least, now I know what I am up against. Thanks again Doug and Old-Biscuit for sharing your knowledge.
The ducts all blow hot air strongly, so based on that it might be the board, I think the smart move would be to first just swap boards and see if that fixes it. If not THEN go after the limit switch. Maybe escape the chore of taking out the whole furnace.
