How To Reset First Alert Smoke Alarm?

Remove the alarm from your ceiling or wall.

Open the cover and take out the battery.

Press and hold the test button for 15-30 seconds.

This will fully reset the smoke alarm and drain any charge left inside.

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.

How do you reset smoke alarm after replacing battery?

Remove the detector from its mounting bracket and unplug the power supply. Remove the battery from the smoke detector. With the battery removed, press and hold the test button for 15-20 seconds. Replace the new battery in the detector and plug in the power supply.

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 you disconnect a First Alert smoke alarm?

First, turn off the AC power at the circuit breaker or fuse box. Next, remove the battery from Smoke Alarms with battery back-up. Finally, press and hold the test button for 5-10 seconds to discharge the branch circuit.

Do you have to reset smoke detector after changing battery?

The only way to clear this error is to reset the smoke detector, which can be done by following these simple steps: Remove the battery from the smoke detector. With the battery removed, press and hold the test button for 15-20 seconds. Replace the new battery in the detector and plug in the power supply.

Why is the red light flashing on my smoke detector?

The flashing red light gives a visual indication that the smoke alarm is functioning properly. It also indicates a working battery is connected to the smoke alarm.

Why does my hardwired smoke detector keep going off?

Electrical Power Surges

A change in the electrical current to the wired smoke alarm will cause the smoke alarm sound to go off when there is not smoke in the air. A loose wire in the smoke detector can also cause it to go off as the electrical current is cut off and then restored to the alarm.

Where is reset button on smoke detector?

Locate the reset button on the surface of the smoke detector. Hold it for 15–20 seconds and then release.

Why is my smoke detector still beeping after I changed the battery?

If you have changed the battery in your chirping smoke detector and it still chirps, you might think your detector is bad. Remove the detector from its mounting bracket and unplug the power supply. Remove the battery from the smoke detector. With the battery removed, press and hold the test button for 15-20 seconds.

Why does my First Alert smoke alarm keep going off?

It is normal for smoke alarms to go off and sound briefly (up to 5-10 seconds) when you install a new battery or when they are powered up. If the alarm continues to go off and no smoke is present, the cause may be one of the following: There may be insufficient battery power, try new batteries.

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Why will my smoke alarm not stop beeping?

To reset your fire alarm and stop the smoke detector from beeping: Remove the battery from the smoke detector (if there is a battery). With the battery removed, press and hold the test button for 15 to 20 seconds. Replace the new battery in the smoke detector and plug in the power supply.

How do you stop a hardwired smoke detector from beeping?

Why Does a Hard-Wired Smoke Alarm Chirp?

  1. Locate the reset button on the surface of the smoke detector.
  2. Hold it for 15–20 seconds and then release.
  3. Wait a couple of minutes and listen for the chirping noise again.