Well I thought some might understand. The furnace thing started a few months ago. It wasn't quite 117 at that time. Sorry if I didn't spell out every little detail for ya. My last toyhauler had a WFCO and the trailer was 7 yrs old when I sold it and it was still running so I guess I don't understand your comment.
You commented previously that @ 80-90 it would go up in smoke anyways. There's a lot of them here in the desert that haven't smoked yet. If things wouldn't take 80-90* then we could not have anything here in this climate.