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.
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.
All smoke Alarms also have a red light that flashes momentarily every 40-60 seconds to visually indicate they are operating. This same red light flashes continuously when the Smoke Alarm has been activated.
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.
Just about every residential smoke alarm blinks. This indicates that the battery/power supply is working properly. That said, a red light will flash all the time if it's operating correctly, but only about once or twice every minute or so.
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.
BLUE/CO: Blue light flashes rapidly when sensor detects elevated CO levels.
A blinking red light on a smoke detector is rarely cause for alarm. Instead, it usually means that the battery is low, or the detector is in need of a minor repair. If you notice a blinking red light, replace the battery first – but only if you're sure that it's still good.
If your alarms use regular batteries, swap in fresh batteries at least once a year. A “chirping” sound means that it's time to change batteries. Because alarm sensors wear out, replace each alarm at least every 10 years. Also, alarms have labels showing when they were made.
A solid green light on your smoke detector indicates that the device is on and operating normally.
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.
Replace the batteries. Replace the front panel and put the detector back on the bracket.
Why is the green power light flashing on my First Alert® plug-in Carbon Monoxide Alarm? A flashing green light is a normal part of the power up cycle. Any time there is a power outage, brownout, surge or other problem with the power, the alarm goes through a power up cycle.
But most smoke detectors are instead designed to go off when their electrical current goes down. That's because smoke in the air will reduce the current. If your battery is dying, the current that's flowing through your sensor also goes down. And so you can get a false positive.
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.
The smoke alarm is desensitized by pushing the Test/Hush button on the smoke alarm cover. If the smoke is not too dense, the alarm will silence immediately and the red LED blinks every 10 seconds. This indicates that the alarm is in a temporarily desensitized condition.
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.
Here's a simple guide: Smoke alarms alert you with three beeps in a row. Carbon monoxide alarms alert you with four beeps.
A flashing green light on a traffic signal means the signal is pedestrian activated. So, when you approach a flashing green light, use caution, because the signal could be activated by a pedestrian at any time and you might have to stop and let the pedestrian to cross.
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.
In others, a steady or blinking green light on a carbon monoxide detector can mean it's detected a** low-level presence of carbon monoxide**. If the presence increased, it would cause the alarm to sound. It could also mean it's time to replace the battery, especially if it's also chirping.
Any flashing yellow signal means drivers are to slow down and proceed through the intersection with caution.
A flashing amber light means you can go when it's safe to do so. You'll find flashing amber lights at a pelican crossing, so this means you can go as long as there are no pedestrians crossing or about to cross the road. Remember, pedestrians still have priority even when the lights are flashing amber.
If the carbon monoxide concentration in the air is much higher, signs of poisoning may occur within 1-2 hours. A very high carbon monoxide concentration can even kill an exposed individual within 5 minutes.