Smoke detector info from First Alert
I have had a strange thing happen over the past few days. My smoke detector that is in the peak of my living room ceiling starts chirping at about 10:15 each night. I thought it was a weak battery but it actually stopped chirping on its own. The next night - it started again!
My thermostat is set to go down to 62 at night because I like the house cold and the last few nights have certainly been cold! I have confirmed with a couple of night and early morning tests that, if I turn the thermostat up to 64 (my daytime setting), the chirping stops!
I called First Alert and they told me it is definitely the battery reacting to cold - they just don't work as well as they start getting old. While on the phone, she told me to use Duracell Coppertops or EveryReady Energizer. These are the batteries recommended in the user guide. Also - the use by date for the batteries should be 4 years away. Still should replace every year! Hope this helps anyone else trying to solve the mystery of the intermittent chirps!
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