Knowing when to replace your furnace gas valve is an essential part of keeping your home safe, cozy and energy smart. The gas valve is an often under appreciated part of your heating system—however, without it, your furnace simply won’t work.

In this blog, Aggressive Mechanical will break down the key signs of a malfunctioning gas valve. Whether you’re trying to diagnose a suspected problem or just want more information about how a furnace works, this guide for Neptune City, New Jersey, homeowners will help you know when it’s time for furnace gas valve replacement—and when to contact the professionals at Aggressive Mechanical.

What is a Furnace Gas Valve and What Does It Do?

To start, it's important to understand what a furnace gas valve is and what it is responsible for. The furnace gas valve controls the flow of natural gas or propane into the unit's burner assembly, allowing the combustion process to occur and produce heat. If gas can't flow, a gas-powered furnace won't give off any heat.

Also a key safety feature, the furnace gas valve is supposed to shut if a problem is detected—preventing a potentially life-threatening gas leak. The typical furnace gas valve lifespan is about a decade or two. Though replacement price varies depending on the kind of furnace and if any other components need fixing, replacing a furnace gas valve costs an average of $300 to $800.

The Furnace Won't Light

One of the signs you may need to replace your furnace gas valve is if the furnace is not igniting or if the pilot light won't light. Gas provides fuel for the flame. Without adequate gas flow through the system, a furnace can't ignite. Occasionally, homeowners also notice that the igniter clicks but there's no flame.

However, a furnace not igniting or a pilot light that won't light or stay lit might also indicate  other mechanical breakdowns, such as a faulty flame sensor, a problem with the thermocouple or low gas pressure. If you notice these signs, it's important to contact a certified HVAC technician for an inspection. They'll safely determine whether the problem a thermocouple vs gas valve issue, or if there's another reason your furnace won't light.

Gas Leak

One major sign of a broken furnace gas valve is a strong odor of gas in your home. This isn’t just a furnace maintenance issue—it’s an emergency. A gas leak can create a fire, explosion or even carbon monoxide poisoning. If you smell gas, evacuate the home immediately, call your gas company or 911, and then phone Aggressive Mechanical for emergency furnace repair.

Your Furnace Keeps Starting and Stopping

Faulty gas valve symptoms also include short cycling. Short cycling describes when a furnace starts, but then quickly stops instead of going through its full cycle. This might be occurring because a faulty furnace gas valve can result in inconsistent gas flow. A valve issue also could force your furnace to turn off to avoid causing a gas leak.

However, sometimes furnace short cycling is caused by other mechanical issues, so it's important to seek out a licensed furnace specialist for evaluation and possible furnace repair. 

What to Do If Your Furnace Gas Valve Isn't Working?

If you suspect your furnace gas valve is broken, it’s crucial that you take action immediately.

First, shut off the gas supply to stop the flow of gas, then turn off your furnace. Don’t attempt to repair the valve on your own. DIY gas valve repair can create a deadly gas leak if not done right and also may void your warranty and gas valve coverage. Whether the gas valve is stuck open, closed or malfunctioning in some other way—gas valve work isn’t a good do-it-yourself task. Besides, when it comes to deciding between gas valve repair and gas valve replacement, it's usually recommended to replace a gas valve instead of repairing it. 

Call Aggressive Mechanical to Be Sure Your Furnace is Ready for the Neptune City, New Jersey, Chill

To replace your furnace gas valve safely, contact the professional Neptune City, New Jersey, HVAC company—Aggressive Mechanical. Our experienced professionals know exactly what to do when it comes to gas valve troubleshooting. We'll diagnose the issue, handle the gas valve replacement safely and ensure your furnace is running efficiently again. To save even more power, we can even connect your system with one of our smart thermostats or provide furnace installation service to help you replace your outdated heating system.

Don’t put your home at risk. Call 732-502-9300 today for gas valve replacement services from Aggressive Mechanical.