A smoke detector blinking red could mean: It's Working Properly: Some brands use an occasional red blinking light to indicate the unit is working properly.
The mains powered smoke alarms have a green indicator. Smoke Alarms have a red light that goes off every 40 to 60 seconds to tell you if they're working. When the smoke alarm is activated, the red light flashes continuously.
What does it mean? Answer. This is the power indicator light: First Alert and BRK alarms have a power indicator light to show you that your alarm is receiving power. Some alarms have a red or green light that blinks every few minutes, while other models blink rapidly or shine a solid light.
If your smoke detector has a blinking red light that flashes every 10 seconds, it means that it is reacting from the after-effects of smoke and is in a temporary desensitized state. When the smoke is no longer heavy in the air, the smoke detector should silence its alarm and the red light will start blinking.
Smoke detector shows steady green light – no alarm
Battery and electrical power smoke detectors will usually have a steady green light to let you know the detector has electrical power and is in working order.
A solid green light on your smoke detector indicates that the device is on and operating normally.
Press and hold the test button on the smoke detector. It can take a few seconds to begin, but a loud, ear-piercing siren should emanate from the smoke detector while the button is pressed. If the sound is weak or nonexistent, replace your batteries.
Low battery: This alarm is equipped with a low battery monitor circuit which will cause the alarm to produce a single “chirp” approximately every 60 seconds and blink the Red LED every 30 seconds, for a minimum of seven (7) days should the battery become low.
If your detector or alarm has a blinking or steady light with no audible alarm sound, this typically indicates that the unit is receiving power.
As the battery in a smoke alarm gets weak, the smoke alarm will “chirp” about once a minute to let you know that the battery needs to be replaced. Note: Only the device with a low battery will chirp. The other interconnected alarms should be silent.
Your alarm manufacturer may have included a blinking red light to let you know it's time to test the alarm again. The Batteries are Low: Usually accompanied by a loud beep, a blinking red light could mean the batteries in the unit are low. Consider adding fresh batteries and running a test to make sure it's working.
For most residential smoke detectors, blinks are common; you need to be conversant with the colors showing. Different smoke alarms use the green and red LED to indicate the device's power status such that a flashing green means low battery while a constant blink means AC power is connected.
The system may need to be reset if you have changed the batteries or switched off the power. There is a red reset button in most alarms. If that doesn't work, hold it down for 15 to 20 seconds.
The most likely reason smoke detectors go off unexpectedly is that people aren't changing the batteries in them often enough. In most sensors you might think of, the strength of the signal goes up when they detect what they're supposed to. Common causes of smoke detector false positives around the house.
Here's a simple guide: Smoke alarms alert you with three beeps in a row. Carbon monoxide alarms alert you with four beeps.
On the bottom of the smoke alarm is a reset button, press it!
You can also use real smoke to test the smoke sensor. To do this, light two or three matches, and hold them together a few feet underneath the detector. The smoke from the matches should cause the alarm to sound if the detector is functioning properly. If it doesn't sound, replace the detector immediately.
Battery smoke detectors run solely on batteries. Hardwired smoke detectors run on electricity, but they also have a backup battery for power outages. When you hear a hard-wired smoke detector beeping, it means you need to replace its battery.
An LED power light on smoke alarms indicates that the device is receiving electricity. A white light appears on certain smoke alarms (particularly First Alert), while a green light appears on others. Some smoke detectors flash every 30 or 60 seconds, while others blink continuously or show a continuous light.
On First Alert carbon monoxide alarms, the red light flashes to show the CO alarm is properly receiving battery power. If you do not see the red light flashing, change the batteries in the alarm immediately.
BLUE/CO: Blue light flashes rapidly when sensor detects elevated CO levels.
The National Fire Protection Association (NFPA) recommends changing the batteries in your smoke alarm every 6 months.
Removing the battery from your smoke alarm won't set it off. It kills the power to the alarm and renders it useless, so you should only remove the battery when you're replacing it with a new one.
The National Fire Protection Association (NFPA) recommends every smoke alarm be replaced after 10 years and that regular batteries be replaced every six months. With 10-year sealed battery alarms, battery replacements and late-night battery chirps are eliminated for a decade.