A smoke alarm that stays quiet on the ceiling looks the same whether it works or not. Before you buy a replacement, or assume the one you have is fine, spend two minutes checking it. The test tells you whether the alarm still sounds, and the label tells you whether it is too old to trust.
Testing it the right way
- Warn everyone at home first, because it will be loud
- Use a sturdy step stool, not a chair
- Press and hold the test button until the alarm sounds
- If it is silent or weak, put in a fresh battery and test again
Do this once a month. The test button confirms the horn and the electronics work, so it is the check manufacturers recommend. Never test with an open flame, and running a vacuum brush over the vents now and then helps keep dust from setting off false alarms.
Next, check the back of the alarm. Smoke alarms are built to last about 10 years, and the manufacture date or a replace-by date is printed on the housing. If yours is past that date, or has no date at all, replace it even if the test passed. The sensing chamber wears out with age, and a passing test does not prove it still detects smoke the way it did when new. A chirp that keeps going after a fresh battery, or from a sealed unit with no battery door, usually means the alarm has reached end of life.
Hardwired alarms are a different job. Most are interconnected, so testing one should set off every alarm in the house. If some stay silent, the problem may be the wiring or a replacement that is not compatible with the others, and swapping hardwired units means handling household voltage overhead. That is where our smoke detector replacement and repair service comes in.
If your alarms fail the test or are past their date, call Northgate Electric at (720) 555-0142 and we will replace them and test the whole system together.
