My house is pretty new, 5 years old. It has interconnected smoke alarms in every room (11), as required. I believe they are all First Alert brand.
We have been getting false alarms from them about every 3 months. Most of them are in the middle of the night which isn't fun for me, and really terrifies my kids (6 & 8).
There is no apparent cause, no cooking is going on, no dust. They go off for a while and stop on their own. Some of these are CO detectors, but we had the Fire Department come out when it happened one time and they tested and everything was fine.
When they are going off, I can't find the one that is causing it because they are all going off. However, on these the "ready" light blinks red if it has been triggered in the past, and every one of the units has triggered based on that. I actually permanently removed one because it triggered 3 times in one night. I thought it was a bad unit, but it just happened again at 5 this morning with a different one.
Nobody has died in this house, so I'm pretty confident it's not ghosts (/s)
Anyone have suggestions?
I had this same issue. I had one alarm going off, and it had one of those 10 year batteries, and no off switch. I put it in a ziplock bag, and weighed it down in a pot of water. It continued to go off for hours. I sent the video to firstalert, they blamed dust, and told me I need to use compressed air about once a month to clean them out. F that, once a month???? I ditched them and got the google nests. They at least tell me which room is going to go off, and gives me a 10 second warning to silence them. You can silence them from any room, as long as you can reach them. Only had them go off randomly once and new batteries did fix it