Why does my gas fireplace smell when it's running?
A faint smell during the first few fires of the season is usually dust and cobwebs burning off the burner and logs, which is normal and short-lived. But a persistent chemical, sulfur, or rotten-egg smell while it runs is not normal, and a rotten-egg odor means gas: shut it off, leave, and call us. Any ongoing odor needs a technician.
The harmless smells
Most gas-fireplace odors are nothing to worry about. The first fires after a long idle summer burn off accumulated dust, pet hair, and spider webs that settled on the burner and logs, and a brand-new unit will smell for its first several fires as factory paint and protective oils cure off the hot metal. You may also catch a faint warm, metallic note as the firebox heats up. All of that is normal and fades within a handful of burns. Cracking a window helps it clear faster.
The smells that mean call us
A few smells are your cue to stop. Rotten egg or sulfur is the odorant added to natural gas and propane so you can detect a leak: leave the house and call from outside. A sharp chemical or burning-plastic smell points to something on or near the unit, or to wiring. And a heavy, oily, sooty smell usually means incomplete combustion from a dirty burner, a lazy flame, or a wrong-fuel orifice on a converted unit, which will also darken the glass. Don't keep running it.
Why it happens and what we do
Two everyday culprits drive most odor calls. First, spiders and dust clog pilot assemblies and burner orifices over the off-season, which is the same reason a gas fireplace so often won't light on the first cold night in November. Second, a unit that's out of adjustment or converted without the right orifice burns dirty and smells. Our annual service cleans the burner, logs, and pilot and confirms clean combustion. Gas work is licensed work in North Carolina, so this is never DIY. Call (828) 545-0525.
Related questions
- Is the smell from a brand-new gas fireplace normal, and how long does it last?
- Why does my gas fireplace smell like burning dust at the start of the season?
- Do vented gas logs normally have a slight smell?
- Does a propane fireplace smell more than a natural gas one?
- Can a gas fireplace give you a headache?
- Do gas fireplaces affect indoor air quality?
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