This will interest those with older RV's assuming the more common, later IV is something like the III. Doubt many on the forum will have the older II. Anyway---
I took out the II's board and replaced it with the III's. The III's is a little smaller in size, but the connections fit. No cover with the III's. I did not transfer the III's on/ off switch, not sure what that is even for.
Went camping again, furnace ran with no stumbles at all, very smooth. So I did not have to take it all out to get at that limit switch. Pure dumb luck!
