Why doesn’t my smoke alarm sound when I push the test button?

Question

My smoke alarm doesn’t sound when I push the test button. Why?

Answer

  • Hold the test button down longer. Try holding the test button down for up to 20 seconds.
  • Check the power supply. Make sure the battery is installed properly – the right way around making contact with the points and/or snapped all the way in place. Even if the alarm sounded briefly when the battery touched the terminals, you still need to make sure it is snapped-in and sitting securely in place. If the battery is loose, you will not be protected if the alarm can not activate and go off.
  • Make sure the AC power is on. Our 240v smoke alarm has a green power indicator light that shines continuously when it is receiving electrical power.
  • For the 10-year lithium battery model, the smoke alarm may not have been properly activated. If the tab broke away before the alarm was activated, you can use a toothpick to move the switch over to activate it.