Title: Questionable reliability
Product review: When we bought our house two years ago, two of these were just installed by the seller (due to the new law in Massachusetts). After about a year, one of them started displaying randomly-on segments on the LCD, making the display useless. Presumably the CO alert still works, but who really knows? Then, the other one needed its battery changed, and after I put in the new set, it too has a corrupted display -- but worse, the alarm is stuck on, so it's pretty much broken.And even when they were working, there's another annoyance: the green "Operate" light blinks brightly once a minute, which takes some getting used to in a bedroom when you're trying to fall asleep.I'll be shopping for a different brand for replacements
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