Why does my gas fireplace smell?
A dusty, burning smell the first few times you light it each season is normal — dust that settled on the burner over the summer is burning off. A rotten-egg or sulfur smell is gas: don't touch switches, get everyone out, and from outside call 911 and Southwest Gas at 877-860-6020.
Scottsdale Chimney Co. · October 4, 2026
If you smell gas — do this first
- Leave the house and leave the door open
- Don't flip light switches, use the thermostat, light anything or start a car in the garage
- From a safe place, call 911 and Southwest Gas at 877-860-6020
- Book a repair only after the gas company has made it safe
Normal: the first-fire smell
After months off, dust, pet hair and the odd insect on the burner and logs burn away the first few times. It should fade within an hour or two of burning. Opening a window helps. If it's still there after a few fires, the burner probably needs cleaning.
Not normal
- A smell like a candle being snuffed or a smoky smell: incomplete burning — logs out of position, dirty burner, or a venting problem
- A chemical or hot-plastic smell: wiring or a part overheating; turn it off
- A musty smell: moisture getting into the chimney or chase, often after monsoon storms
- Soot on the glass or the wall above the fireplace
Get a CO alarm
Every home with a gas fireplace should have a working carbon monoxide alarm nearby. Our service visits end with a test burn and a carbon monoxide check.
FAQ
More answers
What does a gas fireplace repair cost?
In Scottsdale, most repairs run $150 to $450; a gas valve or control board $400 to $1,200. The diagnostic visit is free.
Do you handle propane fireplaces too?
Yes. Some homes toward Cave Creek, Carefree and Rio Verde run on propane. If you smell propane, call 911 and your propane supplier.
Keep reading
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Do gas fireplaces need to be cleaned and serviced?Gas fireplaces burn clean but still need a yearly check. What a gas fireplace service includes, why Valley dust matters, and what it costs in Scottsdale.
Why is there a white film on my gas fireplace glass?Why the glass on a gas fireplace gets a cloudy white haze, how to clean it safely, and when the film or soot means something is wrong.
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