How To Reset First Alert Smoke Detector?

How do I reset my first alert 9120b?

Follow these steps to reset your alarm:

  • Disconnect all power sources (take out the battery, if it is a plug in alarm remove it from the outlet, and if it is hardwired alarm disconnect it from any wiring)
  • Hold the test/silence button for 20 seconds.

Why is my First Alert smoke detector beeping?

It is likely that the reason your smoke alarm keeps chirping and beeping is that the battery is low. Whenever your smoke alarm keeps chirping, replace the battery immediately. Improper wiring on AC or AC/DC smoke alarms. AC alarms will chirp every 5 seconds if the interconnect wire is grounded.

How do I make my smoke detector stop chirping?

How to Stop Smoke Detector Beeping or Chirping –

How do you turn off a First Alert smoke alarm?

If the detector is mounted to the ceiling, place the ladder beneath the detector instead. Press and hold the “Test/Silence” button on the side of the detector for 10 seconds. Release the button to enter “Silence mode” which quits the alarm from sounding.