This ceiling mounted smoke alarm, model P3010L, manufacture date 4/15/2019 went off at 4:00 AM and has not stopped. Currently, its under a mattress to muffle the alarm. There was no smoke, no change in room temp or humidity, or other reason to explain the alarm, which as I mention, continues to alarm nearly 6 hours after it initially startled my family and I awake. Any ideas as to why it alarmed, but more importantly, how do I make it stop?
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I just had the same issues and called Kidde customer support which was fantastic.
It turns out they use a photosensor to determine smoke. When the sensor gets dusty, it will produce false positive alarms. You need to clean the sensor out with compressed air. You can disconnect the alarm from power by twisting clockwise and lowering it to remove a clip to prevent more false negatives before discharging the alarm as @MTA suggests.
AdamO
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To permanently silence the alarm and discharge the battery, follow the instructions that came with the unit:
MTA
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