I have an Atwood Furnace that won't light, or rather stay lit. I am experienced with gas appliances, as I have 50+ gas appliances where I work that I maintain. I also own a 1993 27.5 Wilderness Fifth Wheel trailer and have had great success troubleshooting gas appliances, Even changing out my cooling unit in the Dometic Fridge. However a friend of mine has a 1997 Wilderness with an Atwood furnace that lights, and shuts off in 1-2 seconds. I have checked everything out, including pulling the burner assembly out, and everything looks great. He said that the unit worked great until he bought the new style LP tanks. However the other appliances work great. So I am leaning toward a new control board from Dinosaur Electronics. I found one at Marks Rv Parts for around $90.00. However before I order a new one, is there something that I am missing? Grounds are tight, Gas orifice is clean, and the flame sensor is where it should be, and is clean. Any ideas? In case I can't get back to this forum could someone e-mail me either at work at email@example.com or at home at firstname.lastname@example.org thanks in advance. It's an Atwood 8531-III DCLP.