it needs to be freeI have tinfoil. i am 12, so nothing too crazy.
Do me one big favor.Don't listen to anyone giving answers on this problem. I would seek another technician to check the furnace out. I wouldn't want to hear that you and your family died during the night do to carbon monoxide. This is why they call it the odorless deadly killer. You may be smelling additives in the gas to give you a warning that something is wrong. Carbon Monoxide is odorless
Close to the ceiling. That way you have an early warning. If it's close to the floor and it sounds a warning. If you're still in the house when this happens. You're most likely dead already.
