Question about Kidde Nighthawk Combo Gas/co Detector

2 Answers

Nighthawk model kn-cop-dp, when plugged in i get an error code

I keep getting an error code when plugged in

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  • die2sk8 Jan 04, 2009

    came home and heard this plug-in CO detector chrping every 30 secs (almost like a battery operated smoke detedtor when the 9v battery needs to be replaced). An error code ( Err) was displayed . I un-plugged it and it still appeared. I pushed the test/reset button and still it displyed the error code?

  • djleo Jan 04, 2009

    Alarm chirps ~ every 30 seconds with "Err" displayed. I've attempted to reset the alarm as well as have unplugged the alarm and then plugged it back in with the same results.

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I have the same problem....The answer is the detector has died. This kind of detector has a warranty for 5 years. Mine was assembled 8 years ago and just died this morning. 8 years is good for this kind of detector. The protection device inside wears out in time. Thats why you keep getting an err message.

Posted on Jan 06, 2009

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Actually, it was a pre-planned detector death. See

http://www.fixya.com/support/t921754-carbon_monoxide_detector_err_code

These units expire automatically seven years after power up. Unfortunately this "feature" is only documented in for some models.

Posted on Mar 25, 2010

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