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Question About BRK electronic Smoke Alarm 4120SB
Chirping every 6 minutes...

The one unit downstairs started chirping Friday evening for no reason. I have replaced batteries in every unit and the one unit continues to chirp twice every 6 minutes, like clock work. I thought the unit was bad, so removed it and the chirping moved to another unit with the same 6 minute cycle. This has been going on for 5 days. Any idea what might be wrong?

Asked by JJ on 02/10/2010 2  Answers

ManualsOnline posted an answer 14 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

Westside Sales posted an answer 14 years, 9 months ago

5 Model 4120B is a discontinued model number. Doesnt have to do anything with replacing batteries since the americium-241in the unit is depleted, thus making the alarm sound or chirp telling the homeowner to replace. The new model to purchase is the model 9120B. This will last another 10 years before having to be replaced. Check link for purchasing information
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