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Question About First Alert Smoke Alarm sa4121b
black line 2004 feb 27...

We can't figure out why it still chirps after we replaced ALL the back up batteries. We had to take out the main alarm & switch off the breaker. We put out portable alarms that we had & borrowed 2 more.

Asked by john on 03/08/2010 0  Answer

ManualsOnline posted an answer 14 years, 8 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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