How do you reset the firex I4618 alarm?

SOURCE: My alarms are chirping every 30 seconds or so. I

Depending on manufacturers and such, the catalyst detector element itself may need to be replaced occasionally. Usually cheaper and faster to just get another detector.

SOURCE: our alarm is chirping but not going off

These units, even though "plug-in" also have a 9 volt battery for backup purposes if the A/C goes off. If the display reads "Lb" it means the battery indeed needs to be replaced. Unplug the unit, turn it over and slide the battery access compartment open to replace the battery. If the display reads "Err" and the unit is still under warranty, call Kidde at 1-800-880-6788 to obtain warranty service. If the unit is out-of-warranty (5 or 7 years depending on manufacturing date) replace it as it will not detect CO if it is displaying "Err". *Disclaimer: I am not a lawyer, despite the handle. Words to live by: "Every creative act results from a sudden cessation of stupidity." -Edwin H. Land, inventor of the Polaroid Land Camera "The problem can always be solved with the materials in the room." -My college Physics Lab Instructor