Do You Smell Gas? When to Shut Down and Call Furnace Pros

Smelling gas in your home is never something to ignore—especially when it’s coming from your furnace. That telltale “rotten egg” odor is often a sign of a natural gas leak, and it could pose a serious risk to your home and family. If you detect a gas smell near your furnace, your top priority should be safety—and your next move should be to call the pros immediately.

At Texas Air Authorities, we understand how urgent and dangerous gas leaks can be. Our NATE-certified technicians are trained to respond quickly and safely to gas-related HVAC emergencies across the Dallas-Fort Worth Metroplex, and we’re here to break down exactly what you should do if you suspect a gas leak—and how to prevent future issues.

Why Gas Leaks Are Dangerous

Natural gas is highly flammable. Even a small leak can lead to explosions, fire, or carbon monoxide poisoning if not handled quickly and professionally. Gas used in homes has a chemical called mercaptan added to it to give it a distinct sulfur-like smell—similar to rotten eggs or sewage—making it easier to detect. If you smell this odor around your furnace, take it seriously.

What to Do If You Smell Gas

If you ever smell gas in your home, especially near your furnace, follow these steps immediately:

1. Do Not Use Electronics or Open Flames

Avoid turning on lights, using your phone, lighting candles, or any activity that could cause a spark. Even small electrical activity could ignite the gas.

2. Shut Off the Gas Supply (If Safe to Do So)

If you know how to safely turn off the gas supply to your furnace, do it. The shut-off valve is typically located near the gas line going into the unit. Don’t attempt this if you need to fumble around or if there’s a strong smell—just get out.

3. Ventilate the Area

Open windows and doors on your way out to help disperse the gas. However, don’t linger—evacuate the home as quickly as possible.

4. Leave Immediately

Get everyone—including pets—out of the house. Move to a safe distance before making any calls.

5. Call Emergency Services and Then Texas Air Authorities

Once you’re at a safe distance, call your utility company or 911 to report the gas leak. After that, call Texas Air Authorities. We offer same-day service and can quickly dispatch trained HVAC professionals to inspect, repair, and ensure your system is safe before you re-enter your home.

What Causes Furnace Gas Leaks?

Gas leaks can occur due to a number of issues, including:

1. Cracked heat exchangers
2. Loose or corroded gas line connections
3. Faulty gas valves
4. Improper furnace installation
5. Lack of routine maintenance 

Even minor wear and tear can lead to major safety issues over time, which is why regular furnace maintenance is crucial.

Prevention: Schedule Routine Furnace Inspections

One of the best ways to prevent gas leaks is to have your furnace inspected and maintained annually by certified professionals. At Texas Air Authorities, we:

1. Check all gas connections
2. Inspect the heat exchanger for cracks
3. Test for gas leaks and carbon monoxide
4. Ensure proper ventilation and combustion 

We proudly offer free estimates, same-day appointments, and a 1-year warranty on all new equipment, so you never have to delay when your safety is on the line.

Conclusion

Since 1999, Texas Air Authorities has proudly protected the comfort—and safety—of homes in Arlington, Fort Worth, Grand Prairie, Irving, and beyond. We’re locally owned, deeply rooted in the community, and dedicated to honest, reliable HVAC service.

If you ever smell gas near your furnace, don’t wait. Call Texas Air Authorities for immediate help. We’re on patrol and ready to respond—because your safety is our mission.