However, the reason behind the blinking depends on the manufacturer and models. So, it is better to replace a smoke detector with a new one if it gets too old and malfunctioning. It can also flash when it is at the end of its life span or the batteries are down.īatteries usually drain much quicker than normal when the smoke detector gets too old i.e. A smoke detector may flash red or green for a few seconds when it is powered on. Yes, it is quite normal for a smoke detector to flash red or green. Is it normal for a smoke detector to flash red and green? So, replacing the old one with a new smoke alarm can solve all the problems. It is irritating as well as an issue of concern.Ī smoke alarm usually starts to show unwanted behavior after it is repaired or damaged by contact with water. When a smoke detector gets too old, it can give blinking red lights or unwanted alarms. It is recommended to change the smoke detector every 11 to 12 years. Smoke Alarm is too old:Ī smoke alarm has a limited life span. To know the exact meaning, contact with the manufacturer is suggested. Though most smoke alarms blink red because of malfunctioning some may blink red due to working perfectly. The blinking of the red light after changing the battery on a smoke alarm could mean the alarm is getting power and operating perfectly. We should remember that regular cleaning of the fire alarm helps it to function and operate smoothly. We should also remove the chamber and clean it carefully. We should be careful so that the sensor does not break. The detector should be cleaned with a soft brush. The outside of the smoke alarm should be cleaned with a soft cloth. Many manufacturers add a red warning light with the alarm to let us understand that there is dust inside and it should be cleaned as soon as possible. Dust inside the alarm:Ī smoke alarm blinking red after changing the battery could mean there is dust inside it. If we notice that the batteries are draining more quickly than usual, then we should change the fire alarm and buy a new one. Then, the smoke alarm should be tested to make sure it is working fine.īesides, if the smoke alarm is too old then the batteries also may drain quickly. So, the batteries need to be further replaced with new ones. If we insert old batteries on our smoke alarm, it can start blinking red. There are several reasons for which a smoke alarm could blink red after changing the battery. However, depending on the manufacturer it may also indicate the alarm has started to work perfectly or there is some dust inside the alarm. It may indicate that the batteries inserted are low. It is not a big deal if the smoke alarm blinks red after changing the battery.
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