How to Replace Your ADT Door & Window Sensor Batteries

How to Replace Your ADT Door & Window Sensor Batteries

How to Replace Your ADT Door & Window Sensor Batteries

How to Replace Your ADT Door & Window Sensor Batteries

Many of your ADT devices run off of batteries. Knowing when and how to replace them is essential to maintaining a top-of-the-line security system and a protecting your house. Your door and window sensor batteries being one of them!

Let’s quickly run through when you should replace your door and window sensor batteries and how to do it properly.

When Should You Replace Your Door and Window Sensor Batteries?

The easiest way to know is a zone trouble indicator will appear on your alarm keypad, and a sensor trouble message may appear in your ADT Pulse app.

When you get these messages, you’ll want to replace your batteries as soon as possible.

Depending on your door or window contacts, they’ll either require one CR123A 3v battery or two CR2032 batteries.

(For the best deals on batteries, click here!)

How To Replace Your Batteries

When you’re going to replace your batteries, there’s one thing you’ll want to do before you start:

Set your system into test mode to avoid a false alarm.

To put your system into test mode:

  1. Go to
  2. Go to “My Alarm” in the dashboard
  3. Go to System Management
  4. Then go to “Test System” and place the system on test

To replace your battery, you’ll need a flat head screwdriver to push in the tab. Once you’ve replaced your batteries, make sure the polarity is correct, and then snap it back into place!

Don’t forget, the last thing you’ll want to do after you’ve got new batteries in is go into and take the system out of test mode.

That’s it!

Replacing your door and window sensor batteries is easy, but important. If you have any questions about how to replace your batteries, leave a comment below!

If you have questions about how to change batteries in your ADT glassbreak detector, ADT motion detector,  or ADT Smoke Detector you can check out our battery page or give us a shout.

  • Yuichi Fururyama
    Posted at 18:14h, 26 May Reply

    Have replace a battery (two CR2032) of door sensor, but after replacing it, sensor icon on IQpanel2 is shown like broken. I think I should reset or do something, but I don’k know how to reset or adjustment door sensor. Could you provide a manual for me ?

    • admin2
      Posted at 09:07h, 26 October Reply

      The broken icon usually means that the door or window is open, but check out our user manual section and if you dont find your manual there please contact us and we will find it for you.

  • Ben H
    Posted at 01:09h, 23 July Reply

    Hello Zions! I replaced my battery in my Sensor, but now the Main Keypad is blinking that Sensor’s number and the world “Check” is under it. Is there something I need to do to reset the system? (Safewatch Pro 3000)

    • Zions Security Alarms
      Posted at 15:11h, 07 September Reply

      The cover might just need to be closed all the way. A tamper alarm goes off when you remove the cover and if not put back all the way it will say that

  • Howard Y.
    Posted at 15:17h, 31 January Reply

    I just replace the battery and then reset the system. After the alarm comes back on the low battery notification is gone. However after about 1 hr later I am getting the low battery error again?!?!

    • admin2
      Posted at 09:51h, 04 February Reply

      If you have replaced the battery and it does not go away check and make sure you are replacing the right battery it is saying. Zone battery or a system back up battery. If it does not go away the sensor probably needs to be replaced.

  • Stanley D Thomas
    Posted at 13:13h, 31 August Reply

    I replaced the batteries 2 aaa in the old style sensor on our front door. The chime doesn’t sound when I open the door. And the panel says ready to arm. Did I do something wrong?

    • Kelsey McCallister
      Posted at 15:08h, 31 August Reply

      No, it sounds like the chime in that sensor might have just been turned off. Trying toggling the Chime option on your system off then back on. That should help that door chime again.

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