To quickly silence the low battery beeping, press the Test/Silence button on the detector. Then, enter your keypad's [User Code] + [OFF] (or 1) to mute the system beeps. Finally, replace the detector's battery.
Most systems will begin beeping or chirping as a result of a total power outage or failure to recharge the system backup battery. For many of our most popular systems, beeping alarms and low battery trouble beeps can be silenced by pressing the [OFF] or [#] buttons from the keypad.
For many ADT systems, an alarm or low battery trouble beeps can easily be silenced. Just press the OFF or # button on your keypad. If pressing those buttons on your keypad doesn't silence the low battery alerts on your fire alarm, please check your system user's manual for more detailed next steps.
To silence an alarm beeping due to a low battery, you must either acknowledge the trouble alert on your system, remove the depleted battery, or replace it entirely.
How to Silence a Low Battery Smoke Alarm First Alert
For hardwired units, a steady green LED light indicates that the alarm is receiving AC power. Battery-operated units will have a quick flash every 30-45 seconds. However, this does not necessarily mean the alarm is working. Pressing the Test button is the only recommended method to ensure functionality.
Disabling low battery notifications depends on your device. For iPhones, Apple does not have a native "off" switch, but you can bypass the pop-ups using a clever Shortcuts workaround. For Android and Windows, you can adjust your system settings directly.
When the battery is low, the alarm will make a short beep at regular intervals, typically every 30 to 60 seconds. This is different from the continuous alarm tone that indicates smoke. Low-battery chirps can continue for several days, but it's essential to replace the battery as soon as possible.
When your ADT system indicates a low battery, first identify if the alert is coming from your main control panel or a specific door/window sensor. Silence the beeping by entering your [User Code] + [OFF] (or pressing "OFF") on your keypad, then replace the battery to clear the trouble alert.
To stop your smoke alarm from beeping immediately, press and hold the central Test/Silence button for 15–20 seconds. If it continues, twist the unit counter-clockwise to remove it from the ceiling or wall, take out the battery, and unplug the power connector if it is hardwired.
To turn off your ADT fire alarm, enter your 4-digit user code and press OFF or 1 (depending on your keypad) to silence the siren. Then, enter your code a second time to clear the alarm from the system's memory and reset it.
A smoke detector often says "low battery" after a replacement due to a residual electrical charge, an improper battery type, dust in the sensors, or because the detector itself has expired. Most units require a reset to clear the old warning.
A 10-year sealed battery smoke detector usually chirps because the battery is running low or the unit has reached its "End of Life" and must be replaced. Because the battery is sealed, you cannot simply replace it; the entire unit has expired and requires replacement.
To reset an ADT smoke detector, place your system in Test Mode via the ADT+ app, twist the detector counterclockwise to remove it from the mounting plate, and take out the batteries. Press and hold the test/tamper button for 15–20 seconds to clear residual power, then reinsert the batteries and remount the device.
To instantly silence a blaring ADT alarm, enter your 4-digit User or Master Code followed by OFF (or 1 depending on your keypad). If the beeping persists as a "trouble" alert (e.g., low battery or power loss), press the # (pound) key to silence the chirping.
To turn off Low Battery (or Power Saving) Mode, you can simply use the quick-settings panel or adjust your main device settings. When it's off, your battery icon will return to its normal color.
To silence an alarm beeping due to a low battery, you must either acknowledge the trouble alert on your system, remove the depleted battery, or replace it entirely.
To stop an ADT smoke detector from beeping, first press the "Test/Silence" button on the unit or enter your security code + "OFF" on your keypad. If the beeping persists, replace the batteries or power-drain the unit by holding the test button after removing it from its mount.
The color of the light on your smoke detector indicates its status. While behaviors vary by brand, most standard detectors use a Red or Green flashing light to show normal operation, and a Yellow/Amber light to indicate a fault or low battery.
A blinking red and green light on a smoke or carbon monoxide detector typically indicates a critical system fault, a power issue, or that the unit has reached its end of life. This requires immediate troubleshooting to ensure your home remains protected.
If your alarm has a blinking or steady light with no audible alarm sound, this typically indicates that the unit is receiving power. The color of the LED light and the blinking pattern may differ based on the model you own.
A smoke detector will typically chirp once every 30 to 60 seconds for at least 7 to 30 days before the battery dies completely. However, the battery should be replaced immediately, as the alarm will no longer protect your home once the power is completely drained.
The hush or silence button is typically located on the center or front cover of the smoke detector, often labeled "Test/Hush" or "Test/Silence". It is designed for easy access to silence nuisance alarms—such as cooking smoke—by pressing it directly.