If you hear a long, continuous squeal, this may indicate that your alarm has one of the following conditions: Tamper-resist warning: this can be activated, causing the unit to go into alarm if it has been unplugged or has come loose from the outlet. Flat or low batteries will hinder the functionality of the device, so it's only fitting that your detector gives off a faint beeping sound to warn you of this. Your email address will not be published. battery or 2 AA batteries (depending on the brand of carbon monoxide detector you have such as a Kidde or First Alert brand) to stop the beeping. My Garrison CM detector is doing the change battery beep. How Do I Replace A Smoke Detector Battery? - help.adt.com When the detector senses carbon monoxide, electrical currents in the chemical solution change. The detector has a sensor in it that can alert you to the possible presence of carbon monoxide, and you should generally trust it. Your alarm may have detected carbon monoxide. Please In most communities the fire department will come and measure the CO levels. How to Change Batteries in First Alert Alarms End of Life Warning Seven years after initial power up, a Kidde CO alarm will begin chirping every 30 seconds. McGarry and Madsen. Clean the unit with a microfiber cloth or a can of compressed air. What should I do? CO alarms have a life expectancy of around seven years. Why Does A Hard-Wired Smoke Alarm Chirp? - Cool Today Changing it is necessary if it is yellow. Kidde Carbon Monoxide Alarm Still Beeps After Replacing Battery So, you should go through your smoke detector manual to see what the different sounds mean. It's on the front panel, though the exact location and size of the button vary by brand and model.. Press and hold the Reset button for 5 to 10 seconds.. Release the Reset button, and listen for a beep. Tip: Many smoke and carbon monoxide detectors use a 9v battery but some use lithium batteries that can last for ten years.