When your furnace starts making strange noises, it might be a sign that something is wrong with the gas valve. In this blog post, we’ll show you how to know if the gas valve is bad and what to do about it. Stay warm this winter!
How To Know If Furnace Gas Valve Is Bad
1. The furnace will not start.
When the gas valve is bad, it will not allow the furnace to ignite and therefore, the furnace will not turn on. This can be a very frustrating problem and an expensive one too. If you are having problems with your gas valve, it is important that you call a professional as soon as possible to avoid further damage to your furnace or even worse, a fire in your home.
2. The pilot light keeps going out.
If you have tried starting the pilot light on your furnace and it keeps going out after only a few seconds, this is another sign that your gas valve is bad. You may need to replace the gas valve if this happens often because it could be caused by other issues such as a dirty air filter or clogged venting system which are both fairly easy fixes compared to replacing the gas valve itself.
If you suspect that something else may be causing the problem besides just the gas valve, make sure to call in a professional so they can diagnose what exactly is wrong with your furnace before making any decisions about whether or not you should repair or replace it entirely.
3. The furnace has a strong gas smell.
If your furnace has a strong gas smell that is coming from the vents, then this is another sign that your gas valve may be bad. This is usually caused by a build up of carbon monoxide and propane inside the furnace which can be very dangerous if left to linger.
If you have tried to clean out the vents and do not see any improvement in the smell or if it continues to get worse, you should call a professional as soon as possible to have them check out your furnace.
4. You are getting an error code on the thermostat or control board.
If you are getting an error code when trying to turn on the furnace, this could mean that there is something wrong with either the thermostat or control board itself, but it could also mean that there is something wrong with your gas valve.
It will be important for you to make sure that everything else works properly before deciding whether or not you need to replace your gas valve or just get a new thermostat instead because they are much cheaper than replacing the entire gas valve system on your furnace.
How do you check for a bad gas valve?
There are a few key signs that your gas valve might be going bad. If you notice any hissing or leaking from the valve, it’s definitely time to take a closer look. You should also be on the lookout for any cracks or damage to the exterior of the valve.
Another telltale sign of a bad gas valve is unusual behaviour from your appliances. If your furnace starts acting up or your stovetop flames start flickering, it could be due to a problem with the gas valve. Of course, the only way to be sure is to consult a qualified technician. But if you notice any of these warning signs, it’s best to err on the side of caution and have the valve checked out as soon as possible.
What causes a furnace gas valve to fail?
A furnace gas valve is an essential component of any forced-air heating system. Its job is to control the flow of gas to the burner, and it must be able to withstand the high temperatures generated by the combustion process. However, gas valves can often fail due to a number of different reasons.
One common cause of failure is dirt and debris build-up. Over time, dirt and debris can clog the valve and prevent it from opening or closing properly. Another common cause of failure is corrosion. The high temperatures and harsh chemicals present in the combustion process can cause the valve to corrode and eventually fail.
If your furnace gas valve has failed, it is important to have it replaced as soon as possible. A qualified technician will be able to determine the cause of the failure and install a new gas valve that is designed to withstand the harsh conditions present in a forced-air heating system.