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How often should you replace carbon monoxide detectors?

I have two carbon monoxide detectors in my home. We’ve had them for about four years. I’m not sure if they go bad or if I’m supposed to replace them. How often should you replace carbon monoxide detectors?

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Melanie Mergen · Updated on
Reviewed by Shannon Martin, Licensed Insurance Agent.
Knowing when to replace your home safety devices is important! You should replace
carbon monoxide
detectors every five to ten years. Most carbon monoxide detectors will have an expiration date on the back to let you know when you should replace them.
It can also be helpful to write the date you bought your carbon monoxide detector on the device itself as a useful point of reference.
Here are some things you can do to get the most out of your carbon monoxide detector during its lifespan:
  • Test and clean your carbon monoxide detector monthly
  • If battery-powered, replace batteries every six months
  • Location should be out of direct sunlight and free from excess humidity, smoke, and dust
Since you’ve had them for four years, you’ll want to keep an eye on them. If you notice they’re excessively chirping or full of excess dirt or grease that can’t be cleaned, you’ll likely need to replace them.
It’s important to remember carbon monoxide exposure is deadly. If you’re unsure whether your carbon monoxide detector is giving you a false alarm, you should evacuate your home and call 911.
A good carbon monoxide detector and a good insurance policy have something in common: they both keep your household protected. When it comes to the latter,
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