Good point GP 01 up
I think most people probably never consider that point at all. I've never read anything on the units instructions other than it has that low oxygen sensor?
I did a little on-line research and it turns out that IF the unit keeps shutting off when you try to ignite it, it's becasue you have a FAULTY low O 2 sensor.

My immediate thought was if a defect can cause it to shut off prematurely, then it would seem too me the opposite could happen?

That monoxide alarm could be a lifesaver if that ever happened.