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We’ve uncovered even more unsafe carbon monoxide alarms

Find out what our latest tests into carbon monoxide alarms have discovered, including some alarms that fail to detect CO and could pose a risk to life.

The lethal carbon monoxide alarms we found on Amazon and Ebay

Carbon monoxide alarms bought from Amazon and Ebay have repeatedly failed to detect the killer gas in recent Which? lab tests and would be potentially lethal in your home if...

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