What to do when a carbon monoxide detector goes off for no reason?

If you reading this post, it simply means you want to learn about what to do when a carbon monoxide detector goes off for no reason.

It will be best to go through every detail of this article and how how to put an end to it.

Many individuals are experiencing problems with their carbon monoxide detectors and are unsure if the sound is a warning or a false alarm.

Carbon monoxide can be produced by gas or oil appliances, such as clothes dryers, ovens, or water heaters, are familiar sources of carbon monoxide generation.

Carbon monoxide alarms can give false warnings for a myriad of purposes. False alarms may be aggravating, mainly when they occur in the middle of the night or while cooking.

False or nuisance alarms occur when your smoke detector or carbon monoxide detector goes off despite the absence of smoke or carbon monoxide in your house.

When our carbon monoxide alarm goes off, we first think it can detect CO levels in the ambient.

CO is coming into your home somehow, whether from your own home or a neighbor’s.


The sound that your alarm is producing may not be the alarm sound that warns you when unsafe amounts of CO are present. Most notices include audible noises to signify things like low battery warnings or the alarm malfunctioning.

When you install an alarm, read the user handbook and learn what the various noises mean. Keep the manual secure, so you can refer to it if the alarm goes off.

Do carbon monoxide detectors wear out?

Carbon monoxide sensors are not indestructible and must be replaced regularly. The detector’s internal components deteriorate with time.

The typical lifespan is seven years. Therefore you should change yours every five years.

Carbon monoxide alarms, like smoke detectors, should be installed in every room and floor of your home.

Carbon monoxide detectors can be saved if they are correctly maintained and replaced. It is critical to test your alarms frequently, but it is recommended at least once a month.

When your carbon monoxide detector has removable batteries, they should be replaced at least every six months.

Carbon monoxide alarms do not survive indefinitely, even if the batteries are changed. If your carbon monoxide detectors are damaged or defective, they will beep. Carbon monoxide detectors have a finite lifespan.


After a certain amount of time, the internal sensors and cables might fail, resulting in beeping and, as a result, a false alert. Numerous manufacturers include a construction date or an expiration date on the label of their carbon monoxide detectors.

If yours has no date and you can’t recall when you got it, it’s time for a replacement. Carbon monoxide detectors can save lives by preventing carbon monoxide poisoning.

How to shut off a carbon monoxide detector?

Carbon monoxide detectors are sensitive devices that alert if hazardous amounts of carbon monoxide, or CO, are detected in your house.

Because CO gas may be fatal to people and pets, it’s critical to test and reset each of your detectors regularly, as the manufacturer recommends.

How to reset your carbon monoxide detector.

  • Locate the Reset button. It’s on the front panel, albeit the exact placement and size of the button vary according to the manufacturer and model.
  • Hold down the Reset button for 5 to 10 seconds.
  • Wait for a beep after releasing the Reset button. Some versions may additionally use a flashing light.

If you don’t hear a beep, repeat the reset. Replace the batteries if there is still no beep. Contact the manufacturer or replace your carbon monoxide detector if the problem persists.

Does a carbon monoxide detector go off continuously in the UK?


Typically, carbon monoxide monitors will continue to sound their alert until the quantity of carbon monoxide in the air is reduced to undetectable levels.

Many monitors will beep four times, followed by a pause, and will continue to do so as long as carbon monoxide is present.

A brief chirp per minute on most detector models indicates that the batteries in your alarm are low and should be replaced.

Meanwhile, five beeps per minute indicate that your notice has run its course of life and must be replaced.

Carbon monoxide detectors have a lifespan of five to ten years and should be changed every five years on average. Throughout this period, detectors should be replaced regularly, and batteries should be replaced as needed.

Carbon monoxide detector batteries with sealed batteries can last up to 10 years before needing to be changed.


A carbon monoxide alarm is one of the most crucial devices in your house, whether you’re a landlord, renter, or homeowner. Carbon monoxide poisoning kills around 60 people in the UK annually, even though it is entirely avoidable.

If you are a landlord, one approach to safeguard individuals who live on your property is to install a carbon monoxide alarm. As a result, you must have these devices in any room of your rental property that contains a solid fuel-burning appliance.

How often do carbon monoxide detectors go off?

Your detector will go off several times for various reasons. The carbon monoxide detector warning includes multiple sound patterns to indicate an emergency or if it is just time to replace it. It is critical to understand the differences between the beeps.

  • Four beeps and a pause: Carbon monoxide is present in the air, and you should seek fresh air immediately and dial 911.
  • One beep every minute indicates that the alarm’s batteries are low and should be replaced.
  • Five beeps per minute indicate that your carbon monoxide alarm has reached the end of its useful life and should be replaced with a new carbon monoxide alarm.

It’s critical to test your alarms frequently, but it is recommended that you do it at least once a month. When your carbon monoxide detector has changeable batteries, they should be changed at least once every six months. Even if the batteries are replaced, carbon monoxide alarms do not survive forever.

Will a carbon monoxide detector continue to go off?

When a CO alarm is nearing the end of its useful life, changing the battery will not silence the beep. Sometimes CO detectors include a feature that will quiet the signal for 30 days. However, this will not fix the problem because the CO alarm will continue to sound after the 30-day period expires.

A carbon monoxide alarm that sounds incessantly without ceasing might indicate the presence of carbon monoxide.

If your CO alarm is continually beeping and you experience symptoms of CO poisoning such as dizziness, headache, vomiting, or flu-like symptoms, get some fresh air and contact 9-1-1 immediately.

To safeguard your house and family, you must install at least primary, stand-alone smoke and carbon monoxide detectors throughout your home–it’s a must, however, if you want even greater security, including monitoring and automated notifications to the fire department and other first responders.


Carbon monoxide is known as the “silent killer”  it is odorless, colorless, and tasteless. It is also recorded that over 62 percent of home-related fire deaths as a result of either the home did not have smoke alarms.

Therefore, if your smoke alarms are more than 10 years old, it is advisable to have them replaced or at least inspected at the very least.

Scroll to Top