The independent heating and cooling company across Kentucky and the Ohio Valley
Gas Smell Near the Furnace
You walked past the furnace and caught that rotten egg smell. Maybe it is faint, maybe it hits you at the basement stairs. Either way, you want to know if you should be worried and what to do right now. Here is the order we would follow ourselves, starting with getting everyone out of the house.
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Derby City Comfort service team · field-reviewed before publishing
Step One: Leave the Building, Then Call 911 or Your Gas Utility
If you smell gas near the furnace, get everyone out of the house first. Do not stop to hunt for the source. Walk out the door, take pets and family with you, and leave the door open behind you if that is easy. From outside and well away from the house, call 911 or your gas utility's emergency line. Both will send someone out and neither will charge you for reporting a suspected leak. The utility can shut gas off at the meter and confirm whether the air inside is safe. Once they have cleared the house, call us and we will look at the furnace itself.
What Not to Do While You Are Still Inside
Do not flip any light switch, on or off. Do not unplug anything, use the garage door opener, or start a car in an attached garage. Do not light a match or a lighter, and do not smoke. Skip the phone call until you are outside, because a phone is an electrical device too. Do not try to shut the gas valve at the furnace yourself, and do not open the furnace cabinet to look around. Do not go back in for a laptop or a charger. Windows are a judgement call. If one is right there on your way out, open it, but do not walk deeper into the house to do it.
Carbon Monoxide Is a Different Problem With the Same Answer
Natural gas is scented on purpose so you can smell it. Carbon monoxide has no smell at all, which is why detectors matter. If a carbon monoxide alarm sounds, treat it exactly like a gas smell. Everyone leaves, then you call 911 from outside. Headache, nausea, dizziness or sleepiness that clears up when you step outdoors is worth an urgent look, and a call to your doctor or emergency services. A cracked heat exchanger, a blocked flue or a bird's nest in the vent can all push combustion gases back into the house. None of that is visible from the hallway.
When to Call Us and What We Do Next
Call us after the utility or fire department has been out and told you the house is safe to re-enter. We handle furnace repair and heating repair for homeowners across Illinois, Indiana, Kentucky, Ohio, Tennessee and West Virginia, and a suspected leak at the equipment is exactly the kind of call we take. On site we pressure-test gas connections at the furnace, check the valve and burner assembly, inspect the heat exchanger, and confirm the flue is drawing the way it should. If a component has failed, we tell you what it is and what replacing it involves before we touch anything. If the furnace is sound, we say that too.
Small Smells, Big Smells, and the Ones That Are Not Gas
A faint whiff the first time the furnace runs in October is usually dust burning off the heat exchanger. It fades within an hour or two. That is normal. A sulfur or rotten egg smell is not, no matter how faint, and it gets the same response every time. Occasionally what people report as gas turns out to be sewer gas from a dried-out floor drain trap, common in older basements across the region. We would still rather you leave and call than talk yourself out of it. Once the house is clear, a heating repair visit will sort out which one you are dealing with.
Gas Smell Near the Furnace — what people ask
Should I turn my furnace off if I smell gas?
Not if that means walking to it or touching a switch. Leave the house first and call 911 or the gas utility from outside. They will shut gas off at the meter, which is safer and more complete than a switch.
Is a faint gas smell still an emergency?
Treat it like one. Faint leaks can grow, and your nose gets used to a smell fast. Leave and call the utility. Reporting a suspected leak costs nothing and they would rather check a false alarm.
Can I use my furnace again after the utility leaves?
Only if they say so. If they red-tagged or shut off the furnace, it stays off until the fault is repaired. Call us for the furnace repair and we will get you back to heat.
How it works
- Step 1
Tell us the symptom
Call or fill in the quote form. We ask what changed, when it started, and what the thermostat reads. That short conversation tells us whether you need a visit today or tomorrow morning.
- Step 2
We diagnose on site
A technician checks the thermostat, the electrical side, airflow through the filter and ducts, and the equipment itself. We find the actual cause instead of swapping parts and hoping the noise goes away.
- Step 3
You decide before we work
We explain what failed, what the repair involves, and what we would do if it were our own house. Nothing gets replaced until you say go. Then we test the system before leaving.
- A real person answers
- Open 7 days
- Written quote before work starts
Why homeowners call us
- Old houses and new onesWe are used to century-old homes with retrofitted ductwork and 1970s subdivisions with original returns. Tight crawl spaces, low basement headroom and odd attic runs are normal parts of the day for us, not surprises that stall the job.
- Built for the swingsHumid summers push AC systems hard and January freezes expose weak igniters and cracked flues. We repair for both extremes across the region, so the fix holds when the weather turns instead of failing the first hard week.
- Air conditioning and heating bothAir conditioner repair in July, heating repair in January, and the IAQ and airflow problems that hide in between. One crew that knows how your cooling and heating share the same blower and the same duct system.
- Plain talk, no pressureWe tell you when a repair makes sense and when replacement is the honest answer. No scare tactics about your BTU load, no upsell scripts. You get the condition of the system and a clear next step.
- All major brands, gas & electricEvery major HVAC brand, gas and electric, handled by an independent crew.
- Straight answersIf a system is not worth repairing, we say so, often right on the phone.
About this guide
When the easy checks change nothing, it's time for a tech
Report what you saw during the checks and we handle the rest. A minute to book.
- A real person answers
- Open 7 days
- Written quotes
- All major brands
- Gas & electric
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