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What causes consistent chirping?

Nov 1, 2011

Consistently chirping smoke alarms

The following conditions could cause your smoke alarm to chirp consistently:

  • Low Battery Condition – The alarm will "chirp" every 30-40 seconds (some alarms every 60 seconds) for a minimum of seven days. Replace the battery when this occurs, then test your alarm. 
  • Alarm Malfunction – The alarm will "chirp" between flashes of the Red LED. If this occurs, press and hold the Test button for a minimum of two seconds. If the alarm does not sound your unit has a defective battery or other failure.  
  • Hush Condition – If your alarm has the Hush feature, the alarm will "chirp" every 30-40 seconds for approximately seven minutes while the Hush feature is activated. 
  • End of Life Condition (Sealed Battery Models Only) – The alarm will "chirp" every 30 seconds to indicate it is time to replace the alarm.
  • Interference (For Wireless Alarms Only) – If your smoke alarm enters into Full Alarm and there is no presence of smoke, and the test buttons have not been activated on any units, it is likely you are receiving interference from a similar nearby system. To correct this, refer to your user's manual on how to select a different dipswitch pattern. 

Consistently chirping carbon monoxide alarms

The following conditions could cause your carbon monoxide alarm to chirp consistently:

  • Low Battery Condition – The alarm will Chirp once every 15 seconds to indicate the batteries need replacement. 
  • End of Life Warning – Seven years after initial power up, a Kidde CO alarm will begin "chirping" every 30 seconds. The chirp will not stop until the unit is powered off.
  • WARNING: The alarm will not respond to carbon monoxide in this condition.
  • Malfunction Condition – The alarm will Chirp once every 30 seconds and could indicate a unit malfunction. Call our Product Support when this occurs at 1-800-880-6788. 
  • Error Condition – The alarm will sound continuously indicating a very low battery or unit malfunction.

WARNING: The alarm will not respond to carbon monoxide in this condition.

NOTE: For more information about your specific alarm, refer to your user's manual. 

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