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No, during normal operation, this unit does not chirp every 90 seconds. The following should help explain the chirps/beeps: What Do the Beeps From Your Carbon Monoxide Alarm Indicate? * 4 Beeps and a Pause: EMERGENCY. This means that carbon monoxide has been detected in the area, you should move to fresh air and call 9-1-1. * 1 Beep Every Minute: Low Battery. It is time to replace the batteries in your carbon monoxide alarm. * 5 Beeps Every Minute: End of Life. This type of chirp indicates it is time to replace your carbon monoxide alarm. The above information was taken from https://www.firstalert.com/community/safety-corner/what-does-the-beep-mean
Sorry, there was a problem. Please try again later.It doesn't chirp at all.
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