enblethen wrote:
That was an extremely overloaded conductor. I see that the pin going into the furnace is melted.
What does it look like inside the furnace?
I would do more searching to see what caused this overload.
I will second that and suggest installing a new wire.. A BIGGER WIRE to replace it... If it is ground you could just parallel.. but make sure it's at least 2x the diamater of the old wire.
With the wire damage I am assuming serious voltage loss. if that's the ground this means the Blower may not be blowing fast enough to sail the sail switch (The blower is the big power hog in the furnace) if the sail switch does not sail.. the control board will NOT light the furnace.. Safety thing don't you know.
If it lit the furnace without enough air it could melt the heat exchanger and then either 1: Start a fire or 2: You might go to sleep... .and never wake up (CO Poisoning) . I've heard of both happening with portable propane heaters (never an RV furnace though because of the safety interlocks)