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How do I know when my carbon monoxide detector needs to be replaced? Most store-bought CO detectors have a limited lifespan – usually less than 5 years.
Many people think they can just plug in their CO detector and forget about it. It’s
important to understand that all detectors eventually lose their sensory capabilities
and must be replaced. If your CO detector is a few years old, it’s best to replace it.
You can also test the detector using a CO test kit available at many retailers.
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