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Question About Nighthawk Smoke Alarm None
instruction Manual...

Smoke Detector Nighthawk model: KN-COSM-B constant beep with new batteries installed. I need a manual or info on how to fix it. Thank you Ruben

Asked by Ruben on 01/28/2009 1  Answer

ManualsOnline posted an answer 15 years, 9 months ago

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

Janice posted an answer 10 years ago

0 Check - Your middle battery is installed incorrectly.
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