Will natural gas make a carbon monoxide detector go off?

Author: Stan Olson  |  Last update: Sunday, January 4, 2026

No, carbon monoxide (CO) alarms cannot detect natural gas leaks. They are designed to detect the presence of carbon monoxide, a poisonous gas formed during incomplete combustion of fuels like oil, gas, propane, and wood.

Will natural gas set off a carbon monoxide detector?

Does a Carbon Monoxide Detector Detect Natural Gas? To answer the question, "does a co detector detect natural gas," no, most carbon monoxide detectors will not detect natural gas, as they are different types of gas entirely. Also, most smoke detectors will detect carbon monoxide rather than natural gas.

Does natural gas put off carbon monoxide?

Be alert for carbon monoxide

Even though natural gas doesn't contain carbon monoxide, it can be produced when there's not enough oxygen present for natural gas, oil, or any other fuel to burn properly.

What other gases can set off a carbon monoxide detector?

Lead acid battery chargers produce hydrogen gas which sets off CO detectors. If you are charging your caravan or boat battery at home, this could set off your CO alarm. Once you have made sure that the alarm is false, it is safe to ignore the alarm in this scenario, but remain vigilant for other signs.

Can anything else trigger a carbon monoxide detector?

Even with the doors and windows open, any of these activities can trigger carbon monoxide detectors. Using a grill inside the garage or near open doors and windows–Not only is barbecuing among the most common CO-producing activities, but it can also be a fire hazard when done too close to your home.

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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.

What can cause a false positive on a carbon monoxide detector?

Common causes of false alarms of carbon monoxide: Close to cooking sources (10 feet minimum) Close to sources of humidity (10-20 feet) Near fireplaces.

What would cause a carbon monoxide detector to go off?

The carbon monoxide alarm going off could mean the gas is present in your home or office, or simply indicating the battery or alarm needs replacing. The deadly gas is a product of partial combustion of carbon-based compounds where there is not enough oxygen to create carbon dioxide (CO2).

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.

Will opening a window help with carbon monoxide?

If you experience symptoms that you think could be from CO poisoning: DO GET FRESH AIR IMMEDIATELY. Open doors and windows, turn off combustion appliances and leave the house.

How do I know if my gas fire is leaking carbon monoxide?

Signs of a carbon monoxide leak in your house or home

Sooty or brownish-yellow stains around the leaking appliance. Stale, stuffy, or smelly air, like the smell of something burning or overheating. Soot, smoke, fumes, or back-draft in the house from a chimney, fireplace, or other fuel burning equipment.

Can a natural gas furnace cause carbon monoxide poisoning?

While carbon monoxide is a normal byproduct of the combustion heating process, furnaces are designed to keep this gas enclosed and vent it outside the home. A broken furnace can allow carbon monoxide to mix with the home's indoor air supply, creating a potentially deadly situation.

What kind of detector do I need for natural gas?

Detector Options

Some manufacturers of carbon monoxide detectors offer combination or 3-in-1 detectors to alert when carbon monoxide or an explosive gas such as natural gas or propane is detected.

Can natural gas turn into carbon monoxide?

Carbon monoxide (CO) is a dangerous gas that you cannot smell, taste or see. It is produced when carbon-based fuels, such as kerosene, gasoline, natural gas, propane, charcoal or wood are burned without enough oxygen, causing incomplete combustion.

How to tell if natural gas leak?

If you detect any of the following signs of a natural gas leak in your house or think you have been exposed, contact 911 immediately.
  1. The smell of rotten eggs. In its natural state, natural gas is odorless and colorless. ...
  2. Hissing sounds. ...
  3. Air bubbles outside your home. ...
  4. Dead or dying plants. ...
  5. Higher-than-normal gas usage.

What does it mean if a carbon monoxide detector beeps?

Random Beeps from Carbon Monoxide Detector

LED lights often indicate the battery level, so check if the battery requires replacing if the detector chirps. Low batteries send signals to chirp or beep once every minute. The presence of carbon monoxide causes many beeps every few seconds.

How to test for carbon monoxide without a detector?

Any of the following could be a sign of a carbon monoxide leak:
  1. Floppy yellow or orange flame on your gas hob or oven, rather than a crisp blue flame.
  2. Dark, sooty staining on or around gas appliances.
  3. Pilot lights that frequently blow out.
  4. Increased condensation inside windows.

Can you get carbon monoxide poisoning from a gas stove?

Yes, even gas stoves for home use can expose you to high levels of carbon monoxide, especially if there is no regular preventative maintenance. It can be tempting to use a gas oven for heat during cold months, but prolonged use of the oven can increase CO levels to dangerous amounts in your home during that time.

Can I call the fire department to check for carbon monoxide?

Yes, the fire department can check for carbon monoxide. If you suspect the presence of carbon monoxide in your home or building, it's essential to act quickly. Evacuate the area, ensure everyone's safety, and call your local emergency services or fire department.

What can falsely set off a carbon monoxide detector?

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.

What if carbon monoxide alarm goes off but no fire?

Your carbon monoxide alarm is going off for one of the following reasons: It is doing its job properly and detects CO pollution in the air. It is a false alarm caused by other household items. The detector is malfunctioning or the batteries need changing.

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.

Can a carbon monoxide alarm go off for no reason?

Can My Carbon Monoxide Detector Go Off for No Reason? It is possible to have a carbon monoxide detector going off without any danger present. If you suspect that this is the case, it's important not to ignore it. This could be due to a faulty device, old batteries, or just dust buildup in the unit itself.

Can a gas stove set off a carbon monoxide detector?

A 'malfunctioning' stove, in a poorly ventilated area, could, in an unusual worst case scenario, generate a potentially lethal concentration of CO. This is why any home with combustion appliances: gas stove/oven, furnace, fireplace, water heater, wood stove, or even an attached garage, should have a CO detector/alarm.

How accurate are home carbon monoxide detectors?

We tested 30 detectors in use and found that more than half failed to function properly, alarming too early or too late. Forty percent of detectors failed to alarm in hazardous concentrations, despite outward indications that they were operating as intended.

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