Loud, Continuous Alarming
When the smoke alarm detects combustible products and goes into alarm mode, the pulsating alarm will continue until the air has cleared. For procedures on what to do when your alarm is in active alarm mode, see What to Do When Your Smoke Alarm Sounds.
If a false alarm is activated, one of the following may be the reason:
The sensing chamber may be dirty
Humidity, steam, or other environmental factors
An electrical condition may be causing power to the unit to be interrupted
First, make sure it's not a real alarm. Then, learn how to silence a nuisance or false alarm.
Here's how to do a thorough cleaning of your alarm:
The arrows are showing the areas to clean using compressed air on an ionization alarm. Shown here is an i12060.
The arrows are showing the areas to clean using compressed air on a photoelectric alarm. Shown here is a P3010.
If a smoke alarm is chirping consistently, one of the following may be the reason:
The battery may need to be replaced. An alarm will chirp every 30 to 60 seconds for a minimum of seven days
With a "low battery" announcement, disconnect the unit and replace the batteries. You can also put a unit into low battery hush for up to 12 hours on newer units by pressing the test/hush button
For ways to troubleshoot the problem, see What Causes Consistent Chirping.
Intermittent Chirping (Without a Regular Pattern)
Typically, an intermittent chirp is an indication that the battery is starting to lose charge. Rarely, it's due to the white wire becoming loose in the wire nut.
For ways to troubleshoot the problem, see What Causes Intermittent Beeping or Chirping.