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What does it mean when my kidde smoke alarm is flashing a red light every 15 seconds with no noise? - Quora
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Kidde Part # 21029895 - Kidde Firex Hardwired Inter-Connectable 120-Volt Auxiliary Heat Detector 135 Degree With Battery Backup - Heat Detectors - Home Depot Pro
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Kidde Firex Smoke Detector, Hardwired with 9-Volt Battery Backup & Front Load Battery Door, Adapters Included, Smoke Alarm 21029886 - The Home Depot
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Kidde Firex® Smoke Detector/Alarm Hardwired with Battery Backup & Front-Load Battery Door | HD Supply
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