Smoke Detector Sounding Every Night?

My smoke detectors (hardwired) have decided to start chirping (the sound when battery is low) at around 1:45 am every night. Then they go into full alarm mode. I have figured out which one of the 4 is the 'master' one so I can push the reset button to stop the alarm. However, it goes through the same cycle repeatedly. I've had to shut the circuit breaker and remove the batteries.


I have changed the batteries -- same thing happens. I have replaced all 4 of the smoke detectors w/new batteries -- and same thing happening. Always around 1:45 am.

Any ideas as to what to do next? I don't want to leave my condo unprotected. Nor have all the outlets connected with that circuit breaker not working in my home either.


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February 1, 20170 found this helpful

The fact they're going off at 1:45 may have less to do with the time and more to do with the fact that they are for some reason periodically malfunctioning after a 24 hour stretch.

I am not sure anything can be done but to replace them. THis is clearly some sort of odd malfunction

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February 4, 20170 found this helpful

We have the same problem. Thankfully not in middle of night, but same time in evening. Did u find a solution?

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February 3, 20170 found this helpful

Smoke alarms have a lifespan. Ours started doing that and we had to replace them with new ones.

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