AlBStern wrote:Ah yes, didn't know you were living in the penthouse. Steam can set off a smoke detector but not CO. If it is actually your CO detector, I 'm stumped

The only thing I can think of is that the steam is somehow acting as a transport mechanism for the CO. I guess it would help knowing for sure if it's a CO detector or not.

But yea - call the Fire Department next time - better safe than sorry.