Hp. Someone plz help. The furnace went out and I was just wondering if I could buy the fan engine or if I have to replace the entire thing cuz I cannot find the part anywhere else and was told that needs to be replaced every 10 years anyway..... The furnace as I find on camping world are about $800 and they say suburban, can my RV use that? What furnace do I need? Better yet? How do I find this darn part "in picture" to temp save some money until I can afford a whole new furnace?So I did the dumb thing and passed under something and tore up my rooftop a/c. I removed the old a/c unit and installed a split a/c unit. Man… talk about an upgrade! Anyway, winter is coming and it’s getting cooler. My question is what wires are used to control the furnace and how can I install a thermostat? didn’t think much when removing all the wiring and thermostat and tossed t have a 1990 Catalina Coachman Ford..