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Why does the carbon monoxide detector go off when there are no gas appliances?

My carbon monoxide detector went off this morning. I left the house and called the fire department to be safe, but I’m confused—why does my carbon monoxide detector go off when there are no gas appliances?

avatar
Nick Kunze · Updated on
Reviewed by Shannon Martin, Licensed Insurance Agent.
Good thing you left the house after your alarm went off. Carbon monoxide is a silent killer—you should always exit your home when your carbon monoxide alarm rings. However, gas appliances are just one-way carbon monoxide can build up in the home.
Here are some other possible causes for a carbon monoxide build-up:
  • Oil-burning appliances, like a furnace
  • Your car running in a closed garage
  • Wood and coal-burning appliances, like a fireplace
Or, your carbon monoxide alarm could be malfunctioning. However, never assume a carbon monoxide alarm is a mistake—leave the house and call the fire department! It could save your life.
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MORE:
How to tell if your furnace is leaking carbon monoxide
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