5 Ways to Fix the Carbon Monoxide Detector Beeping in 2022

5 Ways to Turn off the Loud and Annoying Carbon Monoxide Detector Beeping

Are your ears drums about to blow out?  Can’t figure out which smoke alarm it is coming from?  You’re not alone.  Some may even call it a syndrome.  Finding the right C02 sensor when they are beeping can be a real pain.  Below are 5 simple quick ways that you can run through your home and try out on each one to hopefully get the loud chime to stay silent.

How to Fix the Carbon monoxide detector Beeping
Carbon Monoxide detector

1.  Changing Low Batteries

Sometimes the beep might be due to other causes apart from the carbon monoxide leak. In the case that after every 30 to 60 seconds there is a beep. This means that the device’s battery is running low. This can also occur if the device’s life is ending. The two occurrences have a beep after every 30 to 60 seconds. In order to stop the beeping, one has to know about the mentioned details.

Go through each one, remove the batteries and then replace them.  Most take a 9v so have extra of those before.  Sadly, removing the battery doesn’t always work because they are wired together.  If that’s the case, remove from the wiring and try to refrain from throwing the sensor against the wall!

2.  Press the Reset Button

The anatomy of a C02 Sensor shown.  Image source

In the case that there is a beep that occurs after every 30 seconds, you need to reset the device and replace the battery. The resetting can be done by pressing the reset button on the device. It is important when replacing the battery to ensure that the right battery is replaced depending on the type of carbon monoxide detector brand. If the beeping continues after battery replacement, this means that there is another reason.

3.  Call the fire department in case of an actual carbon monoxide leak

A beep that continues for long without stoppage means that there is an actual carbon monoxide leak. Therefore, you need to press the reset or test button on the device and immediately call the fire department. After calling the fire department, it is advised that one should move to the fresh air outside the house and wait for the emergency services to come and air out the building. It is important to note that if the device reactivates 24 hours after detection leakage, a technician should be contacted.

DO NOT CALL 911 unless it is an Emergency.  Do a Google search or look in a phone book for your cities fire department.

If your C02 is connected to your security system, you can also call the company directly and ask them to turn it off.  Companies such as Vivint, Nest, and ADT have C02 sensors as a part of their security system and therefore it is also monitored and can be controlled by them.

4.  Carbon monoxide detector beeping might occur if they are not regularly tested and cleaned

Depending on what brand of C02 Sensors you have (Kidde, Nest, or ADT) you may be able to test yourself.  This just means going through and clicking the buttons, making sure they beep for a while and then set back. The green light means all is well and you are good to go!

Notably, it is important to ensure that carbon monoxide detectors are cleaned. The detectors may be coated with grease and dirt after a certain period of time. The dirt may cause the detector to start beeping. Since the detector manages the airflow, the grease and dirt might block airflow causing the device to assume that there is a carbon monoxide leak.

5.  The carbon monoxide detector beeping might come from a faulty device that needs replacement

Heat/Smoke Sensor

C02 Detectors vary in shape and size but all have a familiar look to them

Obvious right?  But most people will just set the broken C02 sensor aside and then when a fire or Carbon monoxide leak does happen, the device is not mounted and ready for use resulting in harm or death.

In the event that the beeping occurs even after cleaning and battery replacement, then this means the device’s life is ending. This means that the device needs to be replaced with another. However, it is important to note that the specified life of a device is between seven to ten years. Therefore devices that are below five years do not require replacement.

Frequently Asked Questions

Can I replace the batteries in my carbon monoxide detector?

Yes, you actually need to replace them every six months or so to ensure that your carbon monoxide detector will continue to work properly. However, do be aware that even with proper battery care, your carbon monoxide detector will only last for less than a decade – most of them often last for about 5 to 7 years, but it is important to check the specific product for its specified lifetime.

What do 2 beeps on a carbon monoxide detector mean?

When your alarm nears its end of life, it will let you know by beeping 2 times every 30 seconds, so if yours does this it simply means that it’s high time to change the batteries. That’s the only way you’ll be able to stop the beeping in this particular scenario.

What can trigger a carbon monoxide alarm?

There could be many things that might trigger a carbon monoxide alarm, either due to real gas leaks or false alarms. These can include but are not limited to:

  • Malfunctioning gas appliances
  • Air leaks
  • Operating gas-powered vehicles or yard equipment in the garage
  • Grilling or barbecuing too close to an open door, window, or inside the garage
  • Lack of fresh air ventilation indoors
  • Defective CO sensors

How do you reset a carbon monoxide detector KN-COB-B-LPM?

This is best described in this carbon monoxide detector model’s own user manual:

“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 the unit alarms again within six minutes, it is sensing high levels of CO which can quickly become a dangerous situation.”

Final Thoughts

A carbon monoxide detector is an equipment device developed for purposes of detecting the presence of carbon monoxide due to leakage in order to avoid poisoning. Carbon monoxide poisoning incidences have increased and therefore it is good to have a device that detects carbon monoxide leaks. 

At times, the carbon monoxide detector might start beeping without necessarily having a CO leakage. The beeping can be irritating if not fixed. This article discusses how to fix the carbon monoxide detector beeping, and we hope that it has guided you well through finding out all the necessary details to repair it properly.

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