Any of the following situations can cause a false alarm from your smoke detector:
• The cover or sensor chamber may be covered by dust or dirt. Alarms may look clean, but dust can accumulate inside the cover, even in newly built homes. Gently vacuum your smoke alarm regularly using the soft brush attachment.
• Insects may have clogged the sensor chamber. Clean the smoke detector with the soft brush attachment on your vacuum. To prevent repeat problems, clean and treat the surrounding area with insect repellent (DO NOT SPRAY THE SMOKE DETECTOR ITSELF).
• You may have experienced a power interruption. Hardwired smoke detectors may sound briefly when power is interrupted then restored.
• If you have hard wired smoke detectors, you may have a loose electrical connection on your AC or AC/DC smoke alarm. In AC or AC/DC smoke alarms, loose connections can intermittently disconnect power to the smoke alarm. The effect is the same as a power failure. When power is restored, the units may sound briefly.