How to Test Smoke and CO Detectors

Safety first

man checking smoke detector
Photo: Tetra Images / Getty Images Plus
man checking smoke detector
Photo: Tetra Images / Getty Images Plus
Angi Staff
Written by Angi Staff
Contributing Writer
Updated October 4, 2022

Difficulty

Easy

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Time to complete

15 minutes
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  1. Locate Control Buttons

    Find the "test" or "reset" button on your smoke and carbon monoxide detectors. If you are having trouble finding it, refer to the manufacturer's instructions.

  2. Test Each Device Separately

    How many smoke detectors do you have? It usually depends on the type and age of your home. They can be anywhere, so do a good search! Also, some systems are connected – meaning when one goes off they all do. But, in case not, be sure to test each one separately. Even if the smoke detectors are interconnected, you should still test each one to make when one goes off, it triggers the others.

  3. Press Button

    Press the button (Note: you may need a paper clip). If it goes off, your detector is working. The test usually runs about 30 seconds. If your detector does not work, try putting in new batteries. Repeat the test.

  4. Alarms Going Off

    Warning: If the smoke detector is hooked up to your burglar alarm, then we recommend you call your provider in advance to alert them of the test.

  5. Purchase Detectors

    If you don't have smoke detectors in your home, read Purchase Smoke and CO Detectors.

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Learn more about our contributor
Angi Staff
Written by Angi Staff
Contributing Writer
The Angi Content & Editorial team consists of researchers, editors, and producers who share a love of all things home.
The Angi Content & Editorial team consists of researchers, editors, and producers who share a love of all things home.
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