How do you deal with a carbon monoxide detector?

Author: Adell Schaefer  |  Last update: Monday, March 9, 2026

What Should I Do If My Carbon Monoxide Detector Goes Off?
  1. Do not ignore the alarm. ...
  2. All people and pets should quickly evacuate the home and find fresh air.
  3. Call 911 immediately and report that the alarm has gone off.
  4. Do not assume it is safe to reenter the home when the alarm stops.

What should I do if my carbon monoxide detector is on?

Call your emergency services (fire department or 911). Immediately move to fresh air - outdoors or by an open door or window. Do a head count to check that all persons are accounted for.

Should you open windows if the carbon monoxide alarm goes off?

The Fire Department has specialized equipment to detect and measure amounts of CO in your home. Please do not open doors and windows before the Fire Department arrives, because this makes it difficult to determine the cause of any CO that may be present.

How do I get my carbon monoxide detector to stop beeping?

The beeping sound from your carbon monoxide detector every minute or 30 seconds is telling you that the battery is low and needs to be 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) to stop the beeping.

What should you do having detected a carbon monoxide leak?

Don't ignore a CO alarm if it is sounding. If people in the home are exhibiting symptoms of CO poisoning, immediately leave the building and call your local fire department.

What Most Homeowners Don’t Know About Carbon Monoxide Detectors

What to do when there is a carbon monoxide leak?

Immediately go outside to get fresh air, and right away call Poison Help (1-800-222-1222), which connects you to your local poison center. If you feel better when you are out of your home and worse when you return, CO may be present. If you notice this, call 911. Have the fire department check for CO in your house.

Does the fire department charge to check for carbon monoxide?

In most areas, the fire department does not charge to respond to carbon monoxide alarms or to check for the presence of CO in a residence. However, policies can vary depending on the jurisdiction or specific fire department. It's always a good idea to contact your local fire department for specifics on their policies.

What are two warning signs of carbon monoxide poisoning?

The most common symptoms of CO poisoning are headache, dizziness, weakness, upset stomach, vomiting, chest pain, and confusion. CO symptoms are often described as “flu-like.” If you breathe in a lot of CO, it can make you pass out or kill you.

What if the carbon monoxide alarm goes off but no fire?

False or nuisance alarms are when your smoke detector or CO alarm goes off, but there is no presence of smoke or carbon monoxide in your home. However, if your smoke or carbon monoxide detector sounds indicating an emergency and you are not certain it is a nuisance alarm, evacuate the home and call 9-1-1.

How to clear carbon monoxide from a house?

If no one is feeling symptoms, ventilate the home with fresh air, turn off all potential sources of CO - your oil or gas furnace, gas water heater, gas range and oven, gas dryer, gas or kerosene space heater and any vehicle or small engine.

Should I call 911 if my carbon monoxide alarm goes off?

My carbon monoxide alarm is sounding. What should I do? Call 911 and report what is happening. Immediately leave your residence and wait for the fire department to arrive.

How to tell if carbon monoxide is in the air?

The best way to alert you and your family to unsafe levels of CO is to install a carbon monoxide detector. It works like a smoke alarm, sampling the air in your home and creating a loud alarm when levels of the gas are detected. It's important to evacuate your home immediately when your CO alarm sounds.

What to do if carbon monoxide alarm goes off and then stops but?

If you have a carbon monoxide detector chirping and then it stops, it's important to take the situation seriously, even if the alarm is no longer sounding. Even if the alarm has stopped, get everyone out of the home to a place with fresh air. Contact 911 or your local fire department to report the incident.

What else can trigger a carbon monoxide detector?

Any fuel-burning appliance that is malfunctioning or improperly installed. Furnaces, gas ranges or stoves, gas clothes dryers, water heaters, portable fuel-burning space heaters, fireplaces, generators, and wood burning stoves. Vehicles, generators, and other combustion engines running in an attached garage.

Will opening a window help with carbon monoxide?

Opening windows helps the carbon monoxide quickly leave your home (as does opening doors). However, don't leave your exit path when getting out during this emergency to open as many windows as you can. Only open those that are along the way as you leave your home safely.

Will a carbon monoxide detector keep beeping if there's carbon monoxide?

A CO alarm that beeps continuously without stopping could indicate that carbon monoxide is present. If you your CO alarm is sounding continuously and you have signs of CO poisoning such as dizziness, headache, vomiting or flu like symptoms, find fresh air and call 9-1-1 immediately.

Can a carbon monoxide detector give a false alarm?

While CO detectors are designed to be reliable, various factors can cause them to beep erroneously. False alarms can be caused by incorrect installation, placement near a source of fumes or steam, or even a buildup of dust and dirt on the sensor.

How do I shut off the carbon monoxide alarm?

First, look for a button called 'silence' or 'reset'. Hold this button down for 10 or more seconds. Release the button, and the LED lights should blink or turn back on. Your unit might also let out a singular beep.

What does 4 beeps mean on carbon monoxide?

What Does an Emergency Alarm Chirp Mean? This meaning is probably the most self-explanatory. When your carbon monoxide detector chirps 4 times in a row and pauses, this means it has detected unsafe levels of carbon monoxide. This means your entire household should evacuate immediately and seek fresh air.

What gives carbon monoxide in a house?

The most common causes of carbon monoxide building up are incorrectly installed or poorly maintained or ventilated appliances – like stoves and hot water heaters. Poorly ventilated fireplaces and other gas- or wood-burning appliances can also pose danger.

How to detect carbon monoxide with iPhone?

Go to the Home app on your iPhone or iPad. , then tap Home Settings. Tap Safety & Security. Tap Sound Recognition, then turn on Smoke & CO Alarm.

Do you call 911 if the carbon monoxide alarm goes off?

Install a CO detector:

If your CO detector goes off and you feel ill, leave the house and call 911 or the local fire department. If you do not feel ill, push your detector's reset button. If the alarm goes off again after a few minutes, open the windows, leave the house and call 911 or the local fire department.

Can dogs smell carbon monoxide?

Carbon monoxide, commonly known as CO, is an odorless, colorless, and non-irritating gas. No pet can identify the gas because CO lacks any scent whatsoever. Exposure can lead to carbon monoxide poisoning in both humans and pets.

How much does it cost to get your house checked for carbon monoxide?

Professional carbon monoxide testing can cost from $100 to $200+. But, most homeowners usually have carbon monoxide detectors which can range from $20 to $150+, according to Home Advisor, depending on the detector type.

Previous article
Does the size of the water tank affect water pressure?
Next article
Is AC only for cold air?