My furnace (Atwood 8531) will not ignite. The fan runs constantly but no tick tick tick of the ignition. The unusual part is that the interior lights continuously blink when it's trying to start up. The outlets are a solid 120V. I suspect a bad circuit board but the cycling lights have me wondering. I checked the incoming power to the furnace motor and it is cycling as well. The camper is a 1998 Mallard 29. Has anyone else seen this continuous blinking? Thanks for your time.