Maintenance Guides / Safety & Electrical

Test alarm contact sensor batteries

Difficulty: easyTime: 15 mins

Why it matters

Contact sensor batteries last 2-5 yrs; dead sensors create silent zones.

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How to do it

  • 1

    Locate all wireless contact sensors.

  • 2

    Press test button on each sensor.

  • 3

    Check the alarm panel or app for response.

  • 4

    Replace batteries in failed sensors (CR2032 or CR123A).

  • 5

    Re-test replaced sensors.

  • 6

    Document replacement dates.