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Last Updated on January 24, 2021

Gas Smell From Boiler – Leak Symptoms And What To Do

Zac Houghton

Zac Houghton

Construction expert and founder of Loftera.

If you can there is a gas smell coming from your boiler, then this can be a very serious issue that you shouldn’t ignore. That’s because, if there is a gas leak, then there can cause severe health implications that can be lethal in the most extreme circumstances. Below we’ll examine what to do if your boiler smells of gas outside and how to tell if you have a leak. 

smell gas from boiler

Table of Contents

Actions in Case of a Suspected Boiler Gas Leak 

The first thing to do if you suspect there is a gas leak anywhere in your home is call the National Gas Emergency number on 0800 111 999. This will alert the relevant authorities to the potential danger and an engineer will be dispatched to help fix the issue. However, there are a few things you need to do in the meantime. 

First up, switch off all the gas in your house until the engineer has surveyed the issue and confirmed it is safe to turn back on. You should also open all the windows and doors to air out any harmful natural gas that has leaked. 

Any open flames should be avoided at all costs, as they could ignite any gas that is on the premises. That means that, if you’re a smoker, you’re going to wait a bit before you can light a cigarette. As there could be potential electrical problems, try not to use any devices or use powered switches. 

Of course, even if you detect the gas early and have an engineer on the way, there might still be a risk to your physical wellbeing, so you need to be on the lookout for any symptoms. If you do feel ill, call your doctor immediately or even head to the hospital if you are really struggling. 


Boiler Gas Leak Symptoms

The most obvious sign that your boiler is leaking is the smell. The gas itself is odourless, but when it escapes through an appliance like a boiler, then it can be detected by your nose. This will often come in the form of an unpleasant rotten eggs smell. You might also notice black stains around the area the boiler is situated in, which could be an indicator there is a leak. A large volume of condensation, which can be seen by misty windows or wet surfaces, is another thing to look out for.

How Do You Know if your Boiler is Leaking Gas?

While the elements we have talked about above can be signs of a boiler gas leak, the only way to tell for sure is to get a registered professional to have a look. That is why it’s so important to know the signs, as you need to take action quickly if there is even a hint of one. 

Are Boiler Fumes Dangerous?

For the most part, if you act early and follow the steps we’ve outlined in this guide, then a boiler gas leak shouldn’t be harmful. If you do have one, you may experience such symptoms as headaches or feeling sick. However, in rare circumstances, the flue of the boiler can get blocked and begin leaking carbon monoxide, which can be fatal. 

Check Your Boiler Today 

If you’re worried about your boiler, then you should act immediately. It’s not just the health issues you should be concerned about, but the costs involved in getting your boiler repaired or replaced. The longer you leave it the worse it can be, so act now.    

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