Furnace Gas Valve Replacement: DIY Guide

If your home is fitted with a furnace, it’s important to make maintenance a priority. Because if you fail to do so, your furnace could end up failing to work, leaving you without any heating or hot water in your home. This might not be a major issue in the summer months, but in the winter a lack of heat can be incredibly dangerous. It can not only leave you and your family living in a cold house but can also lead to your pipes freezing up and potentially bursting.

Furnaces can be a health hazard if they’re not looked after properly. This is because a furnace that isn’t well maintained becomes more prone to catching fire or leaking gas. So it’s crucial to make furnace maintenance a priority. Whenever you notice an issue, such as that the gas control valve is no longer working properly, it’s crucial to deal with it as soon as possible.

Let’s focus on the gas valve, because it’s an important part of a furnace. A gas valve is used to apply the gas pressure that the furnace is receiving, as well as to provide certain safety features.

It’s crucial that the gas valve is functioning properly because it’s what controls the gas to prevent fires and explosions. It’s also important that it’s functioning properly because if it’s not, the furnace won’t get enough gas to work as it should. What it’s also important to understand is that the gas valve can sense when gas has been heated. When gas travels to the pilot light from the valve, it is ignited. The gas valve senses the heat change in the gas and cuts out the gas supply when a specific temperature is reached. This helps to prevent fires and explosions from occurring.

So, if you’ve noticed a problem with your gas valve, it’s crucial that you replace it as soon as possible. While you could call a contractor to deal with the issue you for you, to save money you could opt to change the valve yourself. To help you to do that, below is a step-by-step guide to what you need to do:

Get the Necessary Tools and Equipment

The first step to replacing your furnace’s gas valve is getting the right tools and equipment to do so. If you don’t already have a toolkit, you’ll need to buy or borrow one. You should be able to get a good deal on toolkits online, so if you’re buying one, opt to buy online instead of at your local hardware store. You’ll also need to take the time to find the correct valve replacement. If you don’t find a valve that is exactly the same as the old one, it won’t fit the furnace properly and may cause gas leakage. This can be incredibly dangerous.

Gas valves don’t just come in one size; there are various makes, models, and sizes to choose from. The best way to ensure that you get the right valve replacement is to simply order an exact copy of the old valve. (The valve make and model should be printed somewhere on it.) You should be able to find this at your local hardware store, or for a lower price, you could opt to order it online. Just make sure that before you buy it, that you’ve got the right size and model of valve selected. Otherwise, you won’t be able to use it.

Have an Electrician’s Number on Standby

The chances are that everything will go swimmingly and you’ll have no problems when changing the valve. However, you never know, so just in case there is an issue, it’s a good idea to have the number for a local electrician on standby. That way, should something go wrong, you can get the advice that you need quickly.

A lot of electricians are willing to offer advice over the phone for small issues, instead of dealing with them in-person. So, if you’re able to find a contractor who will be willing to help you over the phone, should you need it, this is ideal. As that way, you can get help almost instantly, and don’t have to wait for someone to arrive.

Turn Off the Gas Supply

The first thing that you need to do is turn off the gas supply. If you leave the gas supply on, you could cause gas to leak into your home, which can be incredibly dangerous. Turn off the gas at the mains, and then also turn off the gas supply to the furnace, just to be extra safe. This will prevent any gas from leaking out when you’re changing the valve.

If you do smell gas, leave the room and open the windows and doors to get rid of the smell. If the gas smell isn’t starting to go after a few minutes, there could be an issue with the supply. It might be worth calling in an expert to come and help you if gas smell still continues to leak. Gas can be deadly, so if it’s leaking into your home, it’s crucial that you take it seriously.

Remove the Gas Valve

Once you’re sure that the gas is turned off and there’s no leaking, the next step is to remove the gas valve from the furnace. To do this, you’ll need to use a wrench to unscrew the valve. Don’t be too rough with it, be as gentle as you can, as you don’t want to damage the fitting. Use movements that are gentle but firm, to ensure that no damage occurs. Once the gas valve is loose enough, you can then manually remove it from the system.

If for any reason you can’t seem to get the valve loose, don’t attempt to pull it or put too much pressure on it. If you can’t get it loose yourself, it’s probably best to call a contractor in to help you. It might cost you, but if it’s going to prevent damage occurring to the pipes or fitting, it’s worth it.

Attach the New Gas Valve

Once the old valve is off, you can then fix the new valve onto the furnace. To do this, it’s best to use a wrench or pair of pliers. When fixing the new valve to the furnace, keep an eye on the pipes that it connects to. The last thing you want is them getting twisted, as this can cause the furnace not to function properly. So make sure to keep an eye on them, to make sure that they’re not twisted.

Once the gas valve has been fitted, it’s important to check that it’s secure enough. If the valve hasn’t been properly fitted, it may cause gas to leak. Or, it could prevent the furnace from working properly. So, it’s important to ensure that this is properly fitted.

Turn Gas Back On and Check Valve is Working

The next step is to turn the gas back on. Check the gas pressure to ensure that it’s right – if it’s not, reset the pressure. The next step is to check that the furnace is igniting. If the ignition isn’t working, this means that there’s a problem with the gas flow, most probably caused by the gas valve. If this is the case, it could be worth calling out a specialist to have a look and see what the issue.

Use Tutorials

The internet has meant that learning how to do new things is easier than ever. One of the best tools for this is YouTube. YouTube has thousands of tutorials on it for doing all different things, including for how to change a gas valve. If you are unsure about how you should go about any part of changing your furnace’s gas valve, it could be worth watching some online tutorials. Have a watch, take some notes, and you should be all set. By watching how someone else does it, you can ensure that you don’t make any mistakes when changing the valve.

There you have it, a DIY guide to replacing your furnace’s gas valve yourself. Most of the time the replacement process tends to be fairly straight forward. However, sometimes something goes wrong and makes it a little more complex to replace the valve. If this is the case, and you’re not sure how to deal with the problem, it might be a good idea to call in an expert to give you a hand.

Although it’s perfectly fine to fit a new gas valve yourself, if you don’t get it right it can be dangerous. This is because the gas valve regulates the pressure of gas that the furnace is getting, preventing fires and explosions. The gas valve also prevents gas from leaking out of the furnace. So, it’s important to ensure that if you’re fitting a new valve, that you do it right. Otherwise, it could cause all sorts of problems, and could even be dangerous. If you have any doubts, call an expert and get their advice.