Home Improvement Questions? Ask a Handyman for Answers
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Is it hard wired? how old is it?
Then you'll have to unplug it to get it to stop chirping.
Do you have more questions?
It needs a battery. It is odd that the chirping continued for that long.
All new detectors have battery back up in case you lose power. It still works it just makes that annoying beep.
If you don't have any more questions I'd appreciate a fsvorable rating