How do you test a First Alert carbon monoxide detector
Victoria Simmons
Published Apr 13, 2026
You can test this CO Alarm by pressing the Test button on the Alarm cover until alarm chirps. The alarm horn will sound: 4 beeps, a pause, then 4 beeps. The alarm sequence should last 5-6 seconds. If the unit does not alarm, make sure it has been activated correctly, and test again.
How do you know if your carbon monoxide detector is bad?
4 beeps and a pause: This means that there is carbon monoxide in the air and you should seek fresh air immediately and call 911. 1 beep every minute: This means that the alarm has low batteries and you should replace them. 3 beeps every minute: This means the alarm has encountered a malfunction and needs replacement.
How do you test a first alert detector?
You can test this Smoke/CO Alarm: Press and hold the Test/Silence button 3-5 seconds until unit starts to alarm. During testing, you will see and hear the following sequence: The Horn will sound 3 beeps, pause, 3 beeps. The LED flashes Red.
Can you test carbon monoxide detector?
To test accuracy, you can purchase a test kit that has a canister of CO. This allows you to safely expose the alarm to a high level of the dangerous gas, which should trigger an alarm. Keep in mind that CO detectors can take up to 30 minutes to sound an alarm after gas exposure.Do First Alert carbon monoxide detectors expire?
First Alert also offers alarms with 10-year sealed batteries that will last the life of the alarm. What Does an End-of-Life Beep Mean? Most carbon monoxide alarms last between 5 and 7 years. Even if the battery is still good, all alarms should be replaced after 7 years.
Why is my First Alert carbon monoxide light red?
On First Alert carbon monoxide alarms, the red light flashes to show the CO alarm is properly receiving battery power. If you do not see the red light flashing, change the batteries in the alarm immediately.
What can trigger a carbon monoxide detector?
- Malfunctioning gas appliances – Any gas appliance can emit CO if it’s not getting the correct gas to air ratio. …
- Air leaks – Ductwork leaks can pull CO into your home if you use any vented gas appliances, like a dryer, water heater or combustion furnace.
How do I test for carbon monoxide in my home?
The easiest way to see if there is carbon monoxide inside your home is with a carbon monoxide detector (which also includes an alarm). In fact, many building codes require a carbon monoxide gas detector.How do I know if there is carbon monoxide in my house?
Signs of a carbon monoxide leak in your house or home Sooty or brownish-yellow stains around the leaking appliance. Stale, stuffy, or smelly air, like the smell of something burning or overheating. Soot, smoke, fumes, or back-draft in the house from a chimney, fireplace, or other fuel burning equipment.
What does green light on carbon monoxide detector mean?Green and red LED lights that indicate normal operation and alarm status – Green Light: The green LED light flashes every 30 seconds to indicate the unit is operating properly and once every 2 seconds to indicate the unit is in HUSH® mode.
Article first time published onWhat do I do if my carbon monoxide detector beeps?
5. What does it mean if my carbon monoxide alarm is beeping? … 4 beeps and a pause: This means that there is carbon monoxide in the air and you should seek fresh air immediately and call 9-1-1. 1 beep every minute: This means that the detector has low batteries and you should replace them.
What does 3 beeps mean on a carbon monoxide detector?
2. Three beeps, at 15-minute intervals = MALFUNCTION. The unit is malfunctioning. Contact the manufacturer or the retailer where you purchased the alarm.
How do I reset my First Alert carbon monoxide alarm?
To reset the alarm, the unit needs fresh air and time to burn the contamination off the sensor. Push and hold the silence button for 5 seconds to silence the alarm while contamination is being burned off the sensor. You may need to do this a number of times to give the carbon monoxide detector enough time to reset.
What does it mean when your carbon monoxide detector beeps every 30 seconds?
While it’s important to call 9-1-1 if your CO alarm is sounding continuously without stopping, a CO alarm that chirps every 30 seconds is not an emergency. It probably means your CO alarm has reached its end of life and should be replaced.
What to do if carbon monoxide detector goes off and then stops?
Call 911 when your CO detector goes off. Emergency responders are trained to identify and treat the symptoms of CO poisoning. Firefighters are also equipped to find the source of Carbon Monoxide leaks and to stop them.
Can poop set off carbon monoxide detector?
Faeces do not emit carbon monoxide. But high levels of methane (over 500 ppm) from sewage may set off an alarm. Can extremely foul smelling poop cause the CO2 alarm to go off.
What does 4 beeps on a carbon monoxide detector mean?
4 Beeps and a Pause: EMERGENCY. This means that carbon monoxide has been detected in the area, you should move to fresh air and call 9-1-1. 1 Beep Every Minute: Low Battery. It is time to replace the batteries in your carbon monoxide alarm. 5 Beeps Every Minute: End of Life.
Do carbon monoxide detectors give false alarms?
Smoke and carbon monoxide (CO) alarms can false alarm for several reasons. … However, if your smoke or carbon monoxide detector sounds indicating an emergency and you and not certain it is a nuisance alarm, evacuate the home and call 9-1-1.
What color should my carbon monoxide detector be?
ColorVoice notificationWhat it meansRed“Highest carbon monoxide level was [Number] PPM.”Emergency warningsYellow“Detector error.”Possible malfunction or low battery“Alarm has reached its End of Life. Replace Alarm in [Location].”WhiteN/APower indicator and nightlight
What is a carbon monoxide breath test?
The exhaled carbon monoxide test is a useful tool to monitor smoking and help people to quit. The test can also show if you’re being exposed to dangerous levels of carbon monoxide in second-hand smoke, even if you don’t smoke yourself.
Can dogs detect carbon monoxide?
Dogs aren’t able to sense or smell carbon monoxide, so they’re not able to alert their owners to its presence before it happens or when the first leak of carbon monoxide is evident, but it is true that dogs will be affected by carbon monoxide much quicker than humans.
How do I get my first alert alarm to stop beeping?
- Remove the alarm from your ceiling or wall.
- Open the cover and take out the battery.
- Press and hold the test button for 15-30 seconds. …
- Insert the new battery and close the battery compartment.
- Clean the unit with a microfiber cloth or a can of compressed air.
Who do I call if my carbon monoxide detector goes off?
Call 911 immediately and report that the alarm has gone off. Do not assume it is safe to reenter the home when the alarm stops. When you open windows and doors, it helps diminish the amount of carbon monoxide in the air, but the source may still be producing the gas.
Why is my carbon monoxide detector beeping every 40 seconds?
Low Battery – The alarm will chirp every 30-40 seconds (every 60 seconds for some alarms) for a minimum of seven days. Replace the battery when this occurs, then test your alarm. … If the alarm does not sound, your unit has a defective battery or other failure.
How do I stop my carbon monoxide detector beeping every 30 seconds?
A carbon monoxide alarm can be reset by pressing the “RESET” button that is located on the alarm. If after resetting the alarm it keeps chirping, replace the batteries and test the unit. The alarm may have a low battery when it beeps. Replace the batteries when the unit beeps every 30 seconds.
How many times does a carbon monoxide detector beep?
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!
How do you reset carbon monoxide detector after changing battery?
- Locate the reset button. The reset button is found on the front panel of the device. …
- Hold down the reset button for five to 10 seconds.
- Release the reset button. The device will either beep, a light will light up to indicate the device is now working, or both.