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What to do if…
your fireplace or stove is pushing smoke back into the room

Produced and maintained by PanicStation.org Published: Last reviewed: Editorial policy USA guide

Short answer

Stop using the fireplace or stove and get everyone to fresh air. Treat smoke backdrafting as a possible carbon monoxide hazard until emergency responders or a qualified professional say it is safe.

Do not do these things

  • Do not keep burning to “push the smoke out” or relight the fire to test it.
  • Do not assume a carbon monoxide alarm is a false alarm.
  • Do not close the damper or flue to trap smoke in the fireplace or stove.
  • Do not close up the room to contain smoke.
  • Do not try roof work, chimney poking, or appliance disassembly while the system is hot or smoky.
  • Do not run kitchen fans, bathroom fans, or a clothes dryer to “pull smoke out”; they can worsen backdrafting in some homes.
  • Do not re-enter for belongings if a carbon monoxide alarm sounded, anyone feels unwell, or you suspect a gas problem.
  • Do not use the appliance again until it has been inspected and the cause has been fixed.

What to do now

  1. Stop feeding the fire if you can do that without breathing smoke or delaying exit. Do not add fuel. If the stove door is open and you can close it quickly from a safe position, close it. Do not close the damper or flue.
  2. Get everyone to fresh air immediately. Go outside and take pets if you can do so safely. If it does not delay leaving, open an outside door or window on your way out.
  3. If anyone has symptoms, call 911 from outside. Symptoms can include headache, dizziness, weakness, nausea, vomiting, confusion, chest pain, shortness of breath, fainting, or unusual sleepiness.
  4. If a carbon monoxide alarm sounded, call 911 from outside. Do a head count. Do not go back inside until emergency responders say it is safe.
  5. If you smell gas, hear hissing, or suspect a gas appliance problem, leave first. From a safe distance, call 911 and your gas utility emergency line. Do not use switches, phones, matches, lighters, or appliance controls while you are still near the suspected gas area.
  6. If there is active fire risk, call 911. This includes roaring from the chimney, sparks or embers coming from the chimney, flames where they should not be, or rapidly increasing heat or smoke.
  7. Do not try to diagnose the draft problem yourself. Possible causes can include a closed or stuck damper, blocked chimney, animal nest, creosote buildup, damaged flue liner, cap issues, wind effects, a cold flue, or negative pressure from exhaust fans or a dryer.
  8. Arrange inspection before using it again. For a chimney, fireplace, or wood stove, schedule a CSIA-certified chimney professional, or another qualified local chimney professional, to check for blockage, creosote buildup, flue liner damage, cap issues, damper problems, and unsafe venting.
  9. For a gas fireplace or gas heater, arrange qualified service before reuse. Ask the technician to check combustion, venting, shutoff operation, and any carbon monoxide concern.

What can wait

  • You do not need to work out the exact cause right now.
  • You do not need to clean soot while the air may still be unsafe.
  • You do not need to decide on repairs, chimney caps, liners, outside-air changes, or appliance replacement until the system has been inspected.
  • You do not need to save the fire, finish heating the room, or test whether the draft has improved.

Important reassurance

Smoke coming back into the room can happen suddenly, even when the fireplace or stove worked before. Getting to fresh air, taking alarms seriously, and waiting for inspection are the right first steps.

Scope note

These are first steps for the next minutes to hours. Finding and fixing the cause may need emergency responders, a qualified chimney professional, a gas utility, or an appliance technician.

Important note

This is general information, not medical, fire-safety, inspection, legal, or other professional advice. If anyone feels unwell, a carbon monoxide alarm sounds, there is active fire risk, or you suspect a gas problem, seek urgent help and do not use the appliance again until it has been checked.

Additional Resources

Closely connected guides that may be useful during the same situation or its immediate aftermath.

About this guide

This guide was produced and is maintained by PanicStation.org using its published editorial process. Official and specialist sources are checked where relevant, and AI-assisted tools may be used for drafting, organisation, and consistency checks. The site operator remains responsible for publication, revision, and removal decisions.

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