Carbon monoxide detector went off then stopped

Imagine sitting with your family, and all your family members are around and having a nice and cozy dinner or sleeping. Suddenly the carbon monoxide detector stops, causing panic inside your home. You are not even sure that it is either a false alarm caused by hydrogen gas produced by large quantities of petrol fumes, a fault in the detector, or it beeps due to the unwanted levels of CO inside your premises. 

Either you abruptly read the user manual to decipher why the alarm went off, or you quickly run to empty your home and remove everyone inside your home, open the doors and windows and call 911 and keep waiting until the emergency responders arrive to handle that situation.

If there are multiple detectors in your home, find the one that is beeping and examine it. If the sensor flashes red, it works perfectly and is not a false alarm. But, if the red light is not blinking, that’s a sign that the battery needs replacement.

Do your due diligence before considering it a false alarm, as it can put you in a vulnerable situation if it’s not working correctly.

The carbon monoxide detector goes off and stops due to severe reasons. This article will discuss every possible reason to help you figure out what caused the carbon monoxide detector to go off and stop.

Such a situation can be annoying and terrifying, and you would want to uninstall it but do not forget that it’s just for protecting you and your family members from the dangerous poisonous. Gas that you cannot even smell or see.

Without further ado, let’s get started…

Carbon monoxide detector went off then stopped

The carbon monoxide detector went off and then stopped.

If you have witnessed that the carbon monoxide detector went off and then stopped, then you should be worried and try to remember how many times the detector beeps and respond accordingly. Sometimes, the detector needs new batteries, or it’s just broken, or the sensor gets faulty, or there can be an actual event of rising CO inside your home due to leaks or appliance malfunction or any other reason from the handful of the reasons which cause the unwanted CO emission inside your home and as you cannot smell this odorless or colorless glass, the ideal solution is to exit the premises before this deadly and harmful gas tries to get inside your system to poison your body.

The frequent beeping of the Carbon Monoxide detector can be extremely annoying and frustrating, but on the other end, it could be a sign of so many things. Therefore, before you get annoyed, think logically about why the CO detector is going off periodically and then stopping.

This article will discuss several reasons why the CO detector gives a beeping sound and what you should do if such a situation arises.

To understand things better, you should know how dangerous CO gas can be and how easily it can sneak into your home, putting you and your family at risk.

What is Carbon Monoxide Gas?

Carbon Monoxide is a deadly gas that is the by-product of incomplete combustion, and being exposed to the CO means less oxygen going into your lungs and blood cells, causing a large number of problems like headache, dizziness, fatigue or weakness, nausea, vomiting, loss of consciousness, light-headedness, blurred vision, sleepiness, loss of muscle control, increased heart rate, tightening in the chest, confusion, and disorientation. 

CO is a severe threat to any living thing that requires oxygen to be alive, and humans are one of them.

The downside is that this is a colorless and odorless gas, so we cannot detect it on our own. Therefore, a CO detector comes into play.

There can be several reasons for exposure to CO, like burning oil, fossil fuels, propane, and gas. Not only that, this invisible gas emits when fuel burns in your car, truck, stove, grills, fireplaces, gas ranges, furnaces, coal, or any other source, even the appliances in your home like an oven, stove, air conditioner, freezer, all of these devices we use daily emit CO. If not taken care, the increased levels can cause death.

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Not having a CO detector in your home puts your family at a greater risk. A CO detector helps you know when there are rising levels of CO and allows you to take actions like evacuating the home, ensuring ventilation, or calling emergency responders.

You should know that Carbon Monoxide must be avoided to prevent poisoning and ensure that your home has proper ventilation, like open windows, so they escape.

By the way, you should call a home inspector annually to inspect any appliance malfunction, chimney blockages, furnace cracks, or any other possibility of exposure to the CO.


Instructions about Carbon Monoxide Detector

You must agree that a Carbon Monoxide detector is a life-saving device that protects you from exposure to CO, which is one of the harmful and deadliest gases. Therefore, you should double down on installing these detectors in your home.

According to National Fire Protection Association ( NFPA ), each room should have a dedicated detector. It would be best if you were mindful when installing these detectors as placing them in the wrong place like like the garage, kitchen, dusty or dirty, humid, or greasy areas, under direct sunlight, extreme temperatures, crawl spaces, unfinished attics, an un-insulated ceiling can cause unnecessary beeping that will make your frustrating and annoying.

Similarly, do not install the CO detector near appliances constantly releasing CO; otherwise, the detector will keep going off repeatedly. Furthermore, establishing the detector in the bathroom won’t work as the humidity can cause by the steam can trigger the sensor. Likewise, inside your kitchen, the gases released by the stove or food head can trigger the detector, and you won’t be able to bear the sensor anymore.

Therefore, install the detector where you usually sleep or spend most of your time in your home, like the drawing room or living room. Also, do not forget to install the detector near the stairs, inside the basement, or floors above the ground. The best part is that all the sensors can be linked, so if one goes off, others will also trigger, letting you know something is wrong in your home.

On the other hand, you have to keep in mind that the life span of a CO detector is 5 to 7 years, and using the detector after that can be vulnerable as the sensor might not work. Similarly, you should replace the batteries at least once a month or after two months.

The problem many people face with these detectors is unwanted beeping, but you should know that the detector beeps only when it detects traces of CO in the atmosphere. Sometimes, an increasing level of CO can come to your home from the neighbors.

Let’s discuss why your CO detector goes off and stops immediately.

Sometimes, it can be tricky to understand the reason for the detector chirping. Still, once you know all the possibilities, you can tackle this situation perfectly without getting annoyed.

One thing is sure that the dangerous CO gas will sneak up in your home without any warnings and proper ventilation; it will also accumulate in closed spaces, which can result in severe health issues or sometimes death. So, rather than blaming the unnecessary beeping of the detector, consider it a blessing that can give you new life; therefore, it’s made mandatory in commercial and residential buildings and homes.

Why did the Carbon Monoxide Detector Goes off and then Stop?

We will start with the most apparent reasons to the impossible reasons for the CO detector getting triggered.


The first step in troubleshooting is checking the battery of the detector.

Low Battery

The CO detector discontinues performing when it’s in the decline stage and when the battery levels are low. Some homeowners prefer connecting the detectors directly with the grid to ensure they do not have to replace the batteries each month because this is something that most of us will forget.

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If your detector runs on the battery, you will hear three beeps with red lights not blinking, indicating that you need to replace the batteries. If the detectors chip every 30 to 60 seconds, the entire sensor is faulty, and you should mind replacing it ASAP.

Life Span of a Detector

A CO detector is built to last up to 7 years, but I have seen that many people are using the same detector for as long as ten years, which is not recommended for anyone with a family. Thinking that the detector is working fine makes you vulnerable to hazardous gas because the sensor will wear out after a long time. Regardless of the battery levels, the CO detector may not be able to detect rising levels of CO.

Damaged or out-of-service detector

Most of the time, the detector has worn out, expired, or broken, and in this condition, it can start beeping erratically, and those abnormal beeps are not because of the CO levels but due to the damaged sensor or parts of it. Therefore, you should consider replacing it once the time of life is passed for optimum protection.

Fire in the house

Another situation that can cause the detector to go off is the actual fire incident in the house. Therefore, the recommended option for homeowners is that they should integrate all the sensors and must be connected with the grid for constant provision of electricity. If by accident, there are rising levels of CO in one place, all the connected detectors will go off telling you that something is wrong, and you have to figure that out. Then, you can try to identify the source or, without wasting time, empty the premises and get every living body out of the home until the emergency responders do not arrive.

Sudden changes in the room temperature

Sometimes, there can be sudden changes in the room temperature, like when you use the air conditioner and suddenly the hot wind blows in, or if you have a compact home with poor ventilation, then the kitchen heat, appliance temperature, and thermostat temperature can cause the unnesssecary beeping. Therefore, the CO detector should be installed wisely, away from regular CO emission plates.

Improper installation or maintenance

Improper installation of the Carbon Monoxide Detector can be one of the reasons for the trigger, and to avoid that, always hire professionals to install the detector with proper calibration.

False Alarm Caused by Dust

You get more frustrated when you discover that you are being paranoid by the false alarm. False alarm can also be a significant stress factor because it creates unimaginable worry and unnecessary panic due to frequent beeps. Therefore, you should clean it frequently and ensure that it is not installed in areas with a lot of dust or humidity because these are the biggest triggers of the detector.

Error codes from previous instances got triggered.

Moving on, the strange reason for the detector to trigger can be the log records of previous triggers because the sensor maintains logs which sometimes cause problems. Similarly, when you are changing the batteries, you should the detector will get off and blink three times before stopping, thanks to the previous instances, but to resolve this problem, press the sensor 5-10 times. It will contain the erratic beeping for sure.

The battery was not inserted properly:

Another reason a detector can release high-pitched annoying beeps is when the battery is not inserted correctly and keeps beeping for an extended period. You may have to remove the battery by pulling the tabs, and the smoke detector won’t get any power. Still, it will issue the warning that you should insert new batteries. You can remove the pull tab and close the door properly to ensure that the battery is fitted correctly; this way, you can prevent unnecessary chirping of the detector.

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What to do when the CO detector beeps

When you hear the beeping sound, immediately unplug the appliances in your home that can produce the CO before the CO reaches unsafe levels. 

After that, open all the windows inside your home and get everyone out, including your pet. Doo does not forget to call the emergency responders, like 911 or nearby hospitals, and tell them that the alarm went off.

Until any emergency responder hasn’t arrived, do not enter back into the house unless you are sure that the CO levels have gone down or there isn’t anything that is producing the CO because this poisonous gas can immediately affect your brain and body parts and can make it difficult to escape as well if you got late. Therefore, to prevent such misfortunate events, you should do regular home maintenance checkups of your ventilation systems, generators, chimneys, furnaces, central heating devices, and anything else that can be the reason for CO.

Also, it’s a good habit to keep testing your detectors frequently and occasionally.

CO is a tasteless and colorless gas, so it takes time for the gas to dissipate, and with open windows, the concentration of the CO gas may no longer be harmful to you.

Does a carbon monoxide detector go off continuously

No, the carbon monoxide detector won’t go off continuously unless something is wrong with the detector, like the battery is low, the sensor is faulty, or dirt is stuck on the detector.

The carbon monoxide detector went off twice and then stopped

When a carbon detector triggers two times straight back to back, that is a sign of hurrying up as the level of CO rises in that room or where the sensor is placed, and you should immediately leave the room and open the windows for ventilation.

The carbon monoxide detector goes off in the middle of the night and then stops

Mostly carbon monoxide detector goes off in the middle of the night when you forget to turn off the gas stove or heater, which increases the level of CO in the room, causing the detector to trigger in the middle of the night.

Does a Carbon Monoxide Detector go off Continuously?

No, a carbon Monoxide detector doesn’t go off always unless there is an increasing risk of fire but sometimes the smoke detectors are mistaken when placed near the bathroom, kitchen, or in the garage.

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Robert Smith
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Robert Smith

Robert Smith is a technology lover and loves to write about laptops, monitors, printers, tablets, Apple products and anything that's related to computers and games. He is passionate enough that he maintains this blog regarding tech updates on a daily basis.