Vehicle category: recreational vehicles.system: equipment; furnace; connector tube and exhaust gasket.consequences of defect: tube separation combined with inadequate sealing of theexhaust tube or other conditions may allow a colorless, odorless gas calledcarbon monoxide to fill the inside of the vehicle. Breathing carbon monoxidecan cause drowsiness, dizziness, headaches, nausea, and death.note: if a defective furnace IS present, turn it off and discontinue use untilit has been inspected and modified.