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Question About Nighthawk Carbon Monoxide Alarm KN-COPP-3
Alarms reads err...

My NightHawk continues to beep every 30 seconds and continues to read err. We have tried everything encluding putting a new battery. The only way it will stop beeping is to leave the battry out. We have pushed the reset button and also the peak button. Please help us. Many Thanks, Chris and Lorna Fuentes

Asked by Christopher on 03/20/2011 2  Answers

ManualsOnline posted an answer 13 years, 1 month ago

The ManualsOnline team has found the manual for this product! We hope it helps solve your problem. Get the Manual Here

Jane posted an answer 13 years ago

1 I have exactly the same problem and I am at my wits end the thing! If you manage to sort it out please let me know. Thanks, Jane Smith
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