A smoke detector that does not sound is decoration. Testing is the monthly habit that keeps it a detector — and it takes ten seconds per detector. The button is the monthly test; real smoke is the yearly test. Both matter, and they test different things.
The test button confirms the alarm works: the horn, the battery, and the wiring. It does not confirm the sensor detects smoke — the sensor is a separate part, and it is the part that saves lives. Once a year, test with real smoke: a blown-out candle held under the detector, or a smoke spray can made for testing detectors. If the alarm does not sound on real smoke, the sensor is dead.
Press and hold the test button. Press and hold the test button until the alarm sounds — 5 to 10 seconds. A short press may not be enough. Warn the household first: the alarm is loud on purpose.
Test every detector. Test every detector: every floor, every bedroom, and the hallway outside the bedrooms. A detector that works in the kitchen does not help the bedroom at 3 a.m.
Test with real smoke once a year. Once a year, test with real smoke: a blown-out candle held under the detector until the alarm sounds, or a smoke spray can. The button tests the horn; the smoke tests the sensor. Where the detectors go matters — the carbon monoxide detector placement guide covers where and how many you need.
Replace the battery if it does not sound. If the alarm does not sound, replace the battery and test again. A dead battery is the most common reason a detector goes silent — and the most common reason people find out too late.
Replace the detector if it still does not sound. If it still does not sound with a new battery, the detector is dead. Detectors expire after 10 years — check the date on the back. The smoke detector replacement guide covers hardwired and battery models.
Write down the test date. Write the test date on a sticker on the detector, or set a calendar reminder. A monthly test you forget is a monthly test that does not happen.
Monthly button test, yearly smoke test, and a battery at the first chirp — not the next weekend. The first chirp is the warning; the second chirp is the same warning; the silence after that is the battery dying.
A chirp usually means a low battery — replace it. A chirp with a new battery usually means the detector is at the end of its life. The beeping detector guide covers the chirp codes before you yank the battery.
Once a month with the test button, and once a year with real smoke. The monthly test takes ten seconds per detector.
The horn, the battery, and the wiring — not the smoke sensor. The sensor needs a yearly test with real smoke from a blown-out candle or a smoke spray can.
Dead battery first — replace it and test again. If it still does not sound, the detector is dead: check the date on the back, detectors expire after 10 years.
10 years. The date is printed on the back of the detector. After 10 years the sensor degrades and the detector may not detect smoke even when the horn still works.