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Originally Posted by twoplanekid
Having never lived in a community where houses on both sides of the street were built within months of each other, my friends and neighbors are all needing to replace their First Alert smoke detectors. It seems that after seven years, they all do fail and need replacement.
At first, I thought a simple battery replacement would do the trick. I should have listened to the beep code (five chirps) that was telling me a full replacement was needed. I then discussed my issue with several neighbors who told me that almost everyone on the street had recently replaced all of their units.
I seems that two models of First Alert smoke detectors (SC9120B – 9120B) are used with the SC9120B having a carbon monoxide alarm added. Both smoke alarms are AC powered interconnected with battery backup. I needed two SC9120B and two 9120B while my brother up the street needed two SC9120B and four 9120B. As I replaced my old First Alert units with new identical model units, all I had to do was twist the new units onto the original mounting brackets and plug in the existing quick connect clip to the new detector.
Some of my neighbors replaced all of their units with the carbon monoxide alarm added unit as the mounting brackets between the alarms are identical. The cost of the 9120B unit is around $18 and the other online is around $33.
While I did all of the work replacing the alarms this time, seven years in the future if I am still around I believe I will let the fire dept. do the installation work for me. You purchase the alarm and the Villages Fire Dept. will install for free. Hope this information helps others with chirping (five chirps) smoke detectors.
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We live in Sanibel and have replaced most of the detectors. I hope you didn't pay for them because first alert will warranty them to the original home owner as long as you own your home. The same goes for the faucets and exterior door handles. They are diligent in shipping the new items pretty quickly.