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Carbon Monoxide Alarm Is Beeping – How To Reset And Stop Beeping?

What do you do if your carbon monoxide detector goes off? My carbon monoxide alarm is beeping about every minute or so. Does a carbon monoxide detector beeping every 30 to 60 seconds mean a new battery is needed or the battery is low? Or could this mean I have a carbon monoxide leak in my house? Could it just be simply a low battery that makes the beeping noise? Please explain the action I should take at this moment.

Carbon Monoxide Alarm Is Beeping - How To Reset And Stop BeepingCarbon Monoxide Alarm Is Beeping – How To Reset And Stop Beeping?


A beeping sound from your carbon monoxide detector every minute or 30 seconds is telling you that the battery is low and needs replaced. Press the reset button and replace the 9 volt 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. If the carbon monoxide detector is sounding the alarm or beeps more than once per minute, see below…


A continuous beeping sound means there is an actual carbon monoxide leak in your home. It is detecting carbon monoxide and you should get out of the area where the beeping is occurring. Open windows in your house and leave the house. Find out where the carbon monoxide is coming from and fix the issue, or call the fire department. In most communities the fire department will come and measure the CO levels. They will find what is causing the carbon monoxide alarm to keep beeping. They will also tell you what is causing the carbon monoxide leak and assist you in correcting the issue. Be safe and when in doubt, call 911!

Carbon Monoxide Detector Alarm Beeping or Chirping – Kidde

There are many types of alarms a CO Detector provides.
One to warn of high levels of CO.
One to warn of low batteries or “end of life” of the detector.

What to do when your carbon monoxide alarm beeps when CO is detected?
-Press the TEST/RESET button on the alarm.
-Call your local fire department.
-Move to fresh air outside.
-Do not enter the area until emergency services come, the building has been aired out, and the alarm has returned to its normal condition.

NOTE: If the carbon monoxide alarm reactivates in a 24 hour period, call a qualified appliance technician to check the structure to find the source of carbon monoxide. Verify that the alarm system is functioning properly. Any problems should be immediately corrected. Verify that cars are not running in an attached garage or adjacent to the home as this will cause high CO levels.

Where to put carbon monoxide alarm in homeWhere to put carbon monoxide alarm in home?

NOTE: Most carbon monoxide detectors require a certain brand or type of battery. Check the detector manufacturer requirement for the correct brand of battery. The wrong battery type may cause the carbon monoxide detector to beep in some cases.

NOTE: A carbon monoxide detector may need to be cleaned. At times, the carbon monoxide detector cover can get coated with grease, dirt and dust that needs to be washed off. The dirt and dust on the carbon monoxide detector may trigger it to beep. Keeping it clean will prevent this from happening. The dirt can restrict airflow and make the carbon monoxide detector think there is high CO levels and therefore setting it off to keep beeping.

Carbon Monoxide AlarmsCarbon Monoxide Alarms that have multiple safety features!

Have questions about your carbon monoxide detector? Please leave us a message below and we can help!

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15 thoughts on “Carbon Monoxide Alarm Is Beeping – How To Reset And Stop Beeping?”

  1. My CO alarm beeps every ten seconds for about 5 minutes and stops. I’ve changed the batteries on all of the detectors in the house but it started up again 20 mins later. Any advice?

  2. co-by-01 smoke detector
    How to replace battery on pace sensor model co-by-01?
    I can not find the battery compound.

  3. Our detector had a “seven years after power up” chirping activation. It beeped twice every 30 seconds indicating it is time to replace the unit.

  4. We have a Harrison CO2 alarm that beeps and warning of lb showing, however there is no battery inside when I open the battery compartment. I inserted a 9V battery as stated but remained beeping and lb sign on. Model #46-0325-2

  5. I have a Garrison battery operated carbon monoxide detector. How do I replace the batteries and what batteries can I use. I had two Energizer AA2450mAh in them. Should I use these? I think I replaced them once already and I don’t know now if it is ok to use rechargeable and the Energizers specifically.

  6. How do I open the unit to change the batteries? It started beeping a couple of hours ago, it is now 1 a.m. the print on the unit is so small I had to get a magnifying glass to read it. But there is no indicator how/where to open the unit. This is not very user-friendly, and really hard for a senior person to manage in the middle of the night!

  7. We have a Kidde Night Hawk Carbon Monoxide Alarm Model Number KN-COPP B-LP Assembly Number 900-0230LP Date of manufacture 2011 MARCH 15
    We replaced the three AA batteries and now it beeps every 60 seconds. How can we cause the beeps to stop and still activate the monitor?

  8. Our Kidde smoke detector and carbon tester has started chirping. The batteries in there from Kidde test full power. What should I do?

  9. My Kidde carbon monoxide model KN-COPP-B-LPM goes beep-beep-beep about every 12 hours. The digital display remains at 0. They are 3 very quick shrill beeps. What does this indicate?

  10. My Garrison CM detector is doing the ‘change battery’ beep. This happened after a massive power outage. I changed the battery, detector was fine for 12 hours, started to do the single beep again. Unplugged it, plugged it back in and pressed the reset, green light came on, for 12 hours. This started at 3 am Saturday morning, it is now 8 pm Monday night. About every 12 hours, it does the single beep thing every 20 seconds or so. Press reset, green light comes on, good for another 12 hours. What’s going on?

  11. DIY Project Help Tips

    denis nadeau,
    Most likely your Garrison carbon monoxide detector model no: 46-0019-0 is HARD WIRED.

  12. Garrison carbon monoxide detector model no: 46-0019-0 was beeping when i came back from a vacation.
    I took out the battery (back up) and it still beeps when plugged in.
    Question: Do these item have to be replaced? I understand the item says to check the book but i cannot locate it.

  13. Detector is making a continuous loud sound, not beeping. Pushing the reset button does nothing. Neither red or green lights are lit. It is about one year old.

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