As its name suggests, a smoke detector is a device used to sense signs of smoke in a building and an important constituent of a home security system. It issues an audible and visual alarm in case it detects smoke, which is a probable indicator of fire. This device is typically housed in a circular plastic enclosure, which works by ionization or by optical detection. Most detectors are powered by a single disposable battery or a hard wire circuit. Many people complain about their smoke detector beeping without any apparent cause, which is really a bothersome thing. It is agreed that the detectors are designed to beep or chirp in a loud volume for safety purposes; but this loud beeping actually becomes the greatest nuisance.
Worn Out Battery
There are a few really insignificant reasons behind the beeping. If you hear it without a cause, make sure that it has got nothing to do with the battery! For it can simply be a sign of a worn out battery. Replace the battery with a 9 volt battery as an effective measure.
If you notice the beeping without having a problem with the batteries, then its underlying cause must be related to the alarm. If you find the beeping even after battery replacement, just press the test button on the detector, in order to reset the alarm. It will clear the memory of the failing battery and resolve the problem.
Dust and Insects
The problem can also be due to dust or insects that get trapped inside. Use a vacuum attachment; the one which is used for cleaning computer keyboards and clean your smoke sensor. Make it a point to clean the fire alarm system twice a year to avoid any issues.
Backup Battery Dead
Another reason can be failure of the emergency battery backup, which happens in case of a power failure. If the battery backup is zero, then it can start beeping for no reason. In such cases, make sure you replace the battery with an appropriate battery.
Many people complain about the detector beeping every 30 seconds, which is actually the sign of a healthy battery supply to the device. In case you notice the beeping is at a particular time of the day or at regular intervals, then try to alter the temperature levels of your house. Sometimes, this problem occurs in case it senses temperatures that are too hot or too cold.
If your house has more than one detector, then ensure that you are repairing the correct sensor. If none of the above mentioned troubleshooting methods work, then ask an electrician to solve the problem. In rare cases like wrong wiring or a short circuit, you may need to replace the whole system of the house.