My detector (KN0COPP-B) displays 688, with new batteries. Holding alarm in exhaust of running car does not produce an alarm. Is it dead? I bought a new First Alert CO detector it did not alarm when held in exhaust for 1 minute.

Asked by dennis on 12/25/2012 1  Answer

ManualsOnline posted an answer 11 years, 4 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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