Posted on November 21, 2010.
Question About First Alert carbon monoxide detectora He says in his guide warning that "four tones:. Carbon monoxide alarm "
Does that say four beeps non-stop, like "beep, beep, beep, beep ... beep, beep, beep, beep "...a
It identifies four short beeps. (Beep, beep, beep, beep.) Then a pause and the process repeats.