Our first issue with our 1year + Crusader. Tried to fire up the furnace this weekend and the blower would come on and then I could hear the igniter fire and the main burner light. The main burner would then shut back off. It wouldn't shut down immediately but would taper off over about 1/4 to 1/2 a second, like it was burning gas left in the line. Wondering if anyone else has had an issue like this. It seems like a gas delivery issue as i would expect a bad thermocouple to shut the burner down immediately and not taper off? any thoughts?
2004 GMC Sierra 2500
2012 Primetime Crusader 298BHD