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Question About Nighthawk Carbon Monoxide Alarm KN-COPP-3
The unit was beeping, disconnected the unit and ch...

The unit was beeping, disconnected the unit and changed the battery. The screen still showing 888 or err after I installed the battery and beeps. I pressed test-reset button and continue to beep. Pressed the peak level button and no change. I just don't know what to do. Can you help me? Thanks. A grandmother working as the man of the house!!!!

Asked by Sonia Fernandez on 01/23/2014 1  Answer

ManualsOnline posted an answer 10 years, 3 months ago

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

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