What does it mean when a carbon monoxide detector
2020-4-7 · In this regard, what does the red light on my carbon monoxide detector mean? Red Lights on a Carbon Monoxide Detector Mean Business While that's a bit counter-intuitive, it's the way these systems work. For detectors that normally have flashing green lights, a flashing red light can mean that the batteries need to be replaced or there's another type of malfunction that needs to be addressed.
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