How often should I replace my Kidde carbon monoxide detector?

Author: Mrs. Claudia Ondricka  |  Last update: Friday, May 1, 2026

Replace CO Alarms Every 10 Years Carbon monoxide alarms monitor your home 24 hours a day, 7 days a week, and are designed to provide accurate readings for the life of the alarm. But they don't last forever. When your alarm nears its end of life, it will let you know by beeping 2 times every 30 seconds.

What is the lifespan of Kidde carbon monoxide detector?

Kidde carbon monoxide and combination alarms should be replaced every 7/10 years ( depending on the model ) and they all have an end of life warning that will sound continuously when it is time to replace the alarm.

How do you know if your carbon monoxide detector needs to be replaced?

1 beep every minute: This means that the detector has low batteries and you should replace them. 5 beeps every minute: This means your alarm has reached the end of its life and needs to be replaced with a new carbon monoxide alarm.

What is the end of life on a Kidde carbon monoxide alarm?

Your alarm will indicate end of life seven or ten years after initial power. It will 'chirp' every 30 seconds. The chirp will not stop until the unit is powered off.

How do I know if my carbon monoxide detector is expired?

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.

Carbon Monoxide Alarm FULL REVIEW Kidde KN-COPP-B-LPM poisonous gas detector propane meter 2 beeps

What if the carbon monoxide alarm goes off but no fire?

False or nuisance alarms are when your smoke detector or CO alarm goes off, but there is no presence of smoke or carbon monoxide in your home. However, if your smoke or carbon monoxide detector sounds indicating an emergency and you are not certain it is a nuisance alarm, evacuate the home and call 9-1-1.

Why is my brand new Kidde carbon monoxide detector beeping?

If your carbon monoxide alarm is chirping or beeping once every 60 seconds, it may signify: Low Battery – The carbon monoxide batteries need to be replaced. End of Life Warning – Seven years after initial power up, a Kidde CO alarm will begin chirping every 30 seconds.

When should I replace Kidde carbon monoxide?

Replace and upgrade your smoke alarms every ten years.

Smoke and carbon monoxide alarms must be replaced within the specified lifetime of the product, usually 5 to 10 years after the date of manufacture. Check the back of your alarm for the date of manufacturing or contact us if you need assistance.

How do I know if my carbon monoxide detector is dying?

Here's a simple guide: 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.

Where is the best place to put a carbon monoxide detector?

The International Association of Fire Chiefs recommends a carbon monoxide detector on every floor of your home, including the basement. A detector should be located within 10 feet of each bedroom door and there should be one near or over any attached garage.

How can I check if my carbon monoxide detector is working?

To test a carbon monoxide detector, locate the “test” button on your device. Press and hold this button until you hear two beeps or chirps. If you have interconnected alarms operating on the same security system, they should beep together. Your detector may flash a light instead of or in addition to the beeps.

What are two warning signs of carbon monoxide poisoning?

The most common symptoms of CO poisoning are headache, dizziness, weakness, upset stomach, vomiting, chest pain, and confusion. CO symptoms are often described as “flu-like.” If you breathe in a lot of CO, it can make you pass out or kill you.

Is Kidde a good brand for carbon monoxide detector?

Kidde is the only major manufacturer whose CO alarms currently meet the strict standards set forth by both UL and CSA. Accuracy: Look for a statement on the package about the alarm's accuracy level. If the CO alarm is UL Listed, then the accuracy statement will have been certified by UL, too.

How often should I replace my carbon monoxide detector?

How often should I replace my smoke detectors or carbon monoxide detectors? Smoke detectors typically are suitable for ten years. Carbon monoxide detectors are generally good for seven years. When you change your batteries in these units, check the date and replace them before they go bad.

Why did my Kidde smoke and carbon monoxide alarm go off for no reason?

Humidity, dust particles or small insects in the smoke chamber can cause false alarms; this can be solved by vacuuming the mesh and drying the smoke alarm. You may need to relocate your smoke alarm if it is too close to the kitchen, bathroom, air condition units or any other source of humidity.

What is the lifespan of a Kidde co detector?

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.

What can falsely set off a carbon monoxide detector?

Common causes of false alarms of carbon monoxide:
  • Close to cooking sources (10 feet minimum)
  • Close to sources of humidity (10-20 feet)
  • Near fireplaces.
  • Near water heaters.
  • Near furnaces.
  • Located in a poorly ventilated location like a garage, kitchen, or closet.

How to tell if carbon monoxide is in the air?

The best way to alert you and your family to unsafe levels of CO is to install a carbon monoxide detector. It works like a smoke alarm, sampling the air in your home and creating a loud alarm when levels of the gas are detected. It's important to evacuate your home immediately when your CO alarm sounds.

Should green light be on in a Kidde carbon monoxide detector?

Green Light: The green LED will be lit continuously or flash every 30 seconds to indicate the unit is operating properly. In Hush® mode the LED blinks every 2 seconds and once per second if it is the initiating alarm.

Do carbon monoxide detectors ever go bad?

First Alert Carbon Monoxide Detector alarms typically range from 5 to 7 years before needing maintenance, a battery change, or replacement. The manufacturer's carbon monoxide detector expiration date is typically printed on the back of the alarm.

Who replaces carbon monoxide detectors?

Landlords are responsible for ensuring the correct alarms are installed and in working order. Landlords must test the alarm on the day the tenancy begins and repair or replace any faulty alarms reported by the tenant during the tenancy.

How do I know if my Kidde carbon monoxide detector is working?

Whenever the alarm is operating, the green Power LED flashes every 30 seconds to indicate the unit is monitoring for CO. If the alarm senses dangerous levels of CO, the red Alarm LED will flash and the alarm will emit an audible alarm pattern.

Can a low battery cause a carbon monoxide alarm?

If your detector is low on battery, you will likely hear a short chirp every minute. To warn of dangerous CO levels, most detectors will beep 4 or 5 times in a row about every 4 seconds. Do not mistake dangerous levels of poisonous gas for a detector with low battery!

What does 3 beeps mean on a Kidde carbon monoxide detector?

If your detector makes three consecutive beeps around every five minutes, this indicates it is malfunctioning. Newer model detectors will prompt you by saying a recorded message or indicate through light colors. Look to replace your detector.

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