> What if it's leaking CO into your house, what if it gets dangerously hot and causes a fire? Furnaces have multiple checks when they turned on, even on the du

> What if it's leaking CO into your house, what if it gets dangerously hot and causes a fire? Furnaces have multiple checks when they turned on, even on the dumbest furnaces. There are multiple safety mechanisms preventing it from getting too hot. CO leak - what thermostat will do for you here?