Suburban sf30 furnace

Well it might not be a blower fan it the motor that brings the air in before the gas valve opens then once it flames on for a few seconds the blower sends heat into camper. I have only unplugged the wire for igniter flame sensor sense it acts as one otherwise it’s the way it was from dealer. If no defects way when I go on site to price board it said the part as changed order this part number. I don’t know what to think it’s get correct power and gas everything seems to work as it should except it burns up the wire and soots burner. Like I said only have used it for one deer season before this happing just a drag paying 35,000 and getting days days out of a furnace.