If your digital carbon monoxide alarm says “END” on the display, this means it has reached the end of its life and needs to be replaced. The alarm will also chirp 5 times per minute to let you know it's time for replacement. Learn more about CO Alarms: Where to Buy
When the CO alarm displays an End. message, the alarm has reached the end-of-life. The alarm will emit a quick beep every 30 seconds.
CO alarm life span and end-of-life signal
CO alarms have a life expectancy of around 7 years. All CO alarms produced after August 1, 2009 have an end-of-life warning notification that alerts the resident that the alarm should be replaced. The CO alarm will beep every 30 seconds or display ERR or END.
It appears that your alarms might be approaching their expiration. Typically, carbon monoxide alarms such as those from First Alert are designed to last between 5-7 years. When they near this age, they often emit chirps or display an ``END'' or similar error code, which seems to be what you're experiencing.
To determine if your carbon monoxide non-digital alarm has reached its end of life, refer to the following: When the CO alarm emits a quick beep every 30 seconds and the red LED flashes, the unit has reached the end of its 7 or 10 year life.
When the detector is making chirping sounds every 30 seconds, this is not the same as a continuous siren. The chirping sound usually indicates the alarm is near its end of life and requires replacing. Carbon monoxide detectors have a seven-year lifespan. Replacing the battery does not stop this type of beeping.
End-of-life- ERR will appear once the alarm has been active for its 7- or 10-year life to signal an end-of-life warning. Power Surge- If you think a power surge is the cause of the ERR message, press and hold the Test/Reset button for 5 seconds.
The chirp will not stop until the unit is powered off. You'll know that it is an end-of-life warning and not a low battery warning because replacing the batteries will not stop the chirp. The chirp will stop only when the alarm is powered off.
This alarm is acceptable for use in all residential applications where smoke alarms are required. After ten (10) years of cumulative power up, this unit will “chirp” two times every 30 seconds. This is an “operational end of life” feature which will indicate that it is time to replace the alarm.
Smoke alarms alert you with three beeps in a row. Carbon monoxide alarms alert you with four beeps. A single chirp means the battery is low or the detector should be replaced.
Silence feature: When CO reaches alarm levels the alarm will sound—repeating horn pattern: 4 beeps, a pause, 4 beeps, etc. Press and hold the Test/Silence button until the horn is silent. The initial Silence cycle will last approximately 4 minutes.
Kidde CO alarms have a proven life of seven to ten years, depending on the model type. Important Note! CO alarms do not detect the presence of CO when in end-of-life mode. Replace your CO alarms before the end-of-life warning.
How to test your carbon monoxide detectors to ensure they are working properly? To test your carbon monoxide detectors, press and hold the test button on the alarm. The detector will sound 4 beeps, a pause, then 4 beeps for 5-6 seconds. Refer to the user manual for your specific model.
When the carbon monoxide alarm senses a dangerous level of CO gas, the unit will emit a loud alarm pattern. The alarm pattern is four short beeps – followed by five seconds of silence – followed by four short beeps.
Low level: 50 PPM and less. Mid-level: Between 51 PPM and 100 PPM. High level: Greater than 101 PPM if no one is experiencing symptoms. Dangerous level: Greater than 101 PPM if someone is experiencing symptoms.
If the alarm is sounding, pressing the test/reset button will terminate the alarm. If the CO condition that caused the alert in the first place continues, the alarm will reactivate.
If your digital carbon monoxide alarm says “END” on the display, this means it has reached the end of its life and needs to be replaced. The alarm will also chirp 5 times per minute to let you know it's time for replacement.
The Hush® feature of most alarms provides the capability to temporarily lower the sensitivity of the smoke sensor for up to 10 minutes. This feature should be used only when a known alarm condition, such as smoke or heat from cooking, activates the alarm.
Break through label with a screwdriver. Turn the screw to the “OFF” location. This will deactivate the alarm, stop the low battery chirp and render the alarm safe for disposal by draining the battery. NOTE: Turning off the alarm is permanent.
Taking the battery out of a smoke alarm will not make it stop beeping. Even after the battery has died, the detector maintains a residual charge that will keep the chirp going for at least seven days.
When your alarm nears its end of life, it will let you know by beeping 2 times every 30 seconds. Digital models will also display the word "END". Knowing how to identify these sounds and what they mean is essential to keeping your home safe.
To determine if your combo alarm has reached its end-of-life, look for these signs: If the alarm emits a chirp every 30 seconds, it is either an end-of-life alert or a sensor error. If the alarm emits a chirp every 60 seconds, it indicates the battery power is not sufficient to power the unit in full alarm.
What is important is that when an end-of-life signal is sounded, the CO alarm must be replaced. This is true if the unit is a standalone CO alarm, or in a combination unit with a smoke alarm.