I started a thread awhile back about our house Carbon Monoxide detector going off. Short story. It went off, reset it, went off again, called fire department. They come with their meters, read CO, set up their big fan, wait, check it again, no CO. Figured out it was me working on my car about an hour before. Had car pulled "most" of the way out of the garage. From now on I make sure it pulled ALL the way out, lol.
