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I Accidentally Left Gas Stove On Without Flame! (Now What)

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Last updated on December 4th, 2022 at 07:22 am

When it comes to cooking in the kitchen, a gas stove is popular in millions of homes worldwide. A gas stove is known for its numerous benefits, like its controllable temperature change.

However, gas, on the other hand, is toxic, dangerous, and reactive. Thus, what happens if you leave a gas stove on without flame and what should you do?

Leaving the gas stove on without flame will leak gas and a small amount of carbon monoxide (CO). Therefore, don’t switch on any lights or stove immediately to avoid an explosion. Also, excessively inhaling gas or carbon monoxide will cause carbon monoxide poisoning and other health issues.

Accidentally Left Gas Stove on Without Flame Overnight

Gas stove on without flame

It’s dangerous to allow gas out of your stove without flame overnight. So, letting the gas flow into your house for hours will contaminate the fresh air and make the atmosphere dangerous.

In addition, it can cause various health issues or even leave your house prone to explosion.

However, like other heating equipment such as ovens, gas stoves releases some carbon monoxide.

However, too much intake of carbon monoxide leads to carbon monoxide poisoning and other health complications that can lead to death.

A gas leak can also cause a skin reaction if you expose your body to it for long.

Gas exposure causes respiratory distress problems ‘Asthma’ and other mental illnesses. Asthma starts at a younger age; thus, too much CO poison and gas-related illnesses affect children.

Also, carbon monoxide poisoning will affect children more because they breathe faster than adults so that they can breathe in CO more.

Although most gas stoves use natural gas as their fuel, which isn’t that harmful in small quantities.

However, natural gas is lighter than propane which is heavier than air, so the type of gas you use determines the danger risk. 

Also, the toxicity level of the gas/carbon monoxide in the room depends on the type of house and gas setup. For example, houses with a well-designed ventilation system allow air or smoke to exit a building easily.

So if you have such a house, you might be lucky not to blow up your entire building. Then, when your house can take out some of the gas, the gas exposure will not rise to a dangerous level.

Accidentally Left Gas Stove on Without Flame for a Few Hours

When you leave a gas stove on without flame for a few hours, then the gas will leak. However, it depends on whether the gas connection is open and what quantity of gas is available.

A gas leak can be dangerous in many ways, but one equally dangerous substance is carbon monoxide.

If your stove has an electronic ignition that sparks, it’s better to leave the house and try turning off the gas outside.

So don’t try turning off the stove from the stove because it can trigger a spark that will lead to an explosion.

Gas produces little amount of carbon monoxide compared to other fuels. But if left for longer hours, it will become toxic enough to cause asphyxia or chest pain.

Hence, a few hours can be safe and dangerous, depending on how you react to the situation.

For this reason, you will be safe from its dangers only if you switch off the gas stove and let out the air. Don’t use anything that will spark a light, or switch on a light bulb, to avoid an explosion.

And avoid inhaling the gas by staying away from the area till the gas is clear for health reasons.

For example, 350ppm (parts per million) in one to three hours can cause headaches. So you should have a carbon monoxide detector.

Accidentally Left Gas Stove on Without Flame for 5 Minutes 

Accidentally Left Gas Stove on Without Flame

Five minutes of a gas leak can cause an explosion. And inhaling it will cause you some health issues like dizziness, headache, and falling unconscious, if close to it.

In addition, many gas-producing companies add a specific scent to gas because gas is odorless. So you should be able to perceive the gas and equally let gas air out before you use the gas drive.

No matter how long you leave your gas stove on without flame, it’s still dangerous. So always turn off the gas stove and ventilate the building; it’s an ultimate safety measure. 

Even though your gas is odorless, don’t use the stove immediately. When you discover that you accidentally left the gas stove leaking gad, always wait for some minutes or for the atmosphere to clear.

Accidentally Left Gas Stove on Without Flame for 30 Minutes

Leaving the gas stove on for 30 minutes without a flame is quite a lot. And for safety, exit the house and ensure no one or your pet stays inside.

After an hour, it’s safe to go inside but stay out longer to be on the safer side.

Just ensure you get the gas out before returning to your everyday home activities. First, switch off the stove, and make sure you leave all the windows and, if possible, the doors open.

Opening the windows and doors will allow the gas to clear from the atmosphere faster to avoid danger. 

What Happens If You Leave a Gas Stove on All Night Without Flame? 

If you leave your gas stove on all night without flame, the whole house will get filled with gas or carbon monoxide (CO). 

When CO or the gas fills the house throughout the night can suffocate you to death or set your house ablaze.

Five minutes of high carbon monoxide concentration can kill; low concentration requires more time.

However, leaving the gas stove on too long and inhaling excess for too long will cause carbon monoxide poisoning. 

Some gas stoves come with an automatic turnoff button that stops the gas supply to the stove.  Although, only some models of gas stoves come with this device.

Nevertheless, if you don’t have the automatic turnoff device on your stove setup, you can get one and install it.

You should be careful when using your gas stove and gas appliances. When experiencing CO poisoning, you need fast medical help to prevent its advancement to a more severe issue. 

What to Do If You Accidentally Left the Gas On?

Firstly, you must leave the house; if you have a family, ensure everyone is out, even your pet(s). And open all the vent space, like the windows and doors, for some time to allow air inside.

Turn off the gas if it is located outside, and call the emergency or fire department.

Do not turn on or off any light inside, as it’s dangerous and can ignite a spark to cause a fire outbreak. If you have a car garage close to the affected area, make sure you don’t also start it. 

If still in doubt about your safety after taking some safety measures, reach out to the fire department. Then, contact the non-emergency fire service department to run a gas test in your house.

Running a gas test helps you know the level of danger your house might be in due to gas exposure. 

Equally important, you should have a gas leak/carbon monoxide detector for your house for safety measures.

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The carbon monoxide detector protects against high concentrations in a room. When the concentration reaches 100 ppm, it notifies you. 

Since it’s a modern world, the only illnesses from indoor cooking you suspect are from excess smoke inside.

Therefore, people neglect the health dangers of gas exposure to humans, internally and externally. 

If anyone exhibits carbon monoxide poisoning symptoms, take the person to the hospital.

And make sure you (and your family)  go for a medical check-up to know the amount of CO in your body.

How Long Does It Take for Gas to Air Out?

For gas to air out completely, it will take hours, and it can take from 20 minutes to a few hours.

So it depends on how long you leave the gas leaking. A whole day is preferable for maximum safety.

While waiting for the gas to air out, it’s better to abstain from any form of flame. That is, for a whole day at least, anything capable of sparking. 

You should also aid the removal of the gas by ventilating your house in any way possible.

However, you should install a vent hood in your kitchen for gas leaks.  If you don’t have a good vent, then ensure your windows are open. 

The hood vent will aid in the removal of unsafe air from going outdoors. Make the back burner your cooking burner for the safe exit of gas when it leaks.

The back burner is the area where the gas will pass through easily.

Can You Get Carbon Monoxide Poisoning from a Gas Stove?

Yes, you can get carbon monoxide poisoning from your gas stove, no matter how long you inhale it.

This is because you can unknowingly be inhaling carbon monoxide from the stove while cooking, which brings about carbon monoxide poisoning.

And the poisoning effect rate depends on how long you inhale the gas. 

A gas stove is a helpful appliance but has its drawback, and the stove emits a harmful substance known as carbon monoxide(CO).

CO is colorless and odorless, like air, making it hard to detect. Except its effects start showing up, or you have a carbon monoxide detector. 

For instance, if you start having dizziness, headaches, and vomiting while cooking, it’s probably a carbon monoxide poisoning effect.

So if you start feeling sick, you should go for a carbon monoxide check/ treatment. 

Meanwhile, it’s essential to know how carbon monoxide and being exposed to gas leaks can affect you. 

Other air pollutants with carbon monoxide like nitrogen dioxide and formaldehyde complicate your health.

According to scientific researchers, Some percentage of respiratory problems come from the use of gas appliances.

You may also ask, how does carbon monoxide affect the respiratory system?. Well, carbon monoxide makes it hard for the body/blood to obtain oxygen; this makes breathing difficult as a result.

The problem gets even worse with time when the lungs and heart get a low amount of oxygen can lead to lung and cardiovascular disease.


It’s best to be on the safe side, use your gas stove responsively, and avoid getting carbon monoxide poisoning.

The fact that your gas stove emits CO doesn’t mean it’s not safe to use. Lastly, always turn off gas burners before leaving the kitchen to sleep or go out.

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