What you'll need
- Xfinity Home Security, Shield Select from Xfinity Home, or Xfinity Smart Home service
- XHD2 Door/Window Sensor
- One CR2 battery
- Double-sided tape (optional)
Difficulty
Medium
Do you need a battery?
Make sure you have batteries before you proceed. Visit your nearest retail store that sells batteries or click the button below to order your replacement battery kit.
Call us at 1-800-XFINITY if you receive a low battery alert within 30 days of device installation.
How to install the battery
If you subscribe to Xfinity Home Security:
- Before proceeding, make sure that your system is disarmed. Working on devices while the system is armed can generate false alarms.
- You may want to have some double-sided tape on hand if your sensor becomes detached from the wall. Use the tape to reattach your sensor if its existing adhesive fails to hold it in place.
Help protect our environment. Please properly recycle your discarded batteries, which are conveniently accepted at various locations. To find a recycling location near you, check call2recycle.org or call 1-800-8-BATTERY (1-800-822-8837).
Make sure your sensor looks like the one in the image below. If it does, you're in the right place to find out how to install a battery in your sensor.
- Slide the battery cover to expose the battery as shown. The cover will slide a short distance and then stop. After sliding the battery cover, you may receive a tamper alert from your system. The tamper alert warns you when the cover of your device is open and will clear once the battery is replaced and the cover has been closed.
- Note: Don’t press the factory reset button. If you do, close the battery compartment fully, and then repeat step 1.
- If a battery is already present, remove it by placing your fingertips on either side in a pinching motion, at the positive (+) end of the battery. Then gently pull it free from the slot.
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Important: If you're replacing the battery in response to a low battery alert, wait 10 seconds between removing the current battery and inserting the new battery. The alert won’t clear if the battery is replaced too quickly.
- Insert one CR2 battery into the battery slot positioning the positive (+) end of the batteries as shown in the battery diagram.
- Once the battery is installed, slide the battery cover to close the device. The LED will light green for two seconds.
- If you’re replacing the battery, confirm that the low battery alert has resolved and the Sensor appears on your list of connected devices in your touchscreen.
- If you subscribe to Xfinity Home Security: You can also confirm using the Xfinity Home app.
- If you subscribe to Shield Select or Smart Home: You can also confirm using the Xfinity app.
- Test the sensor to confirm it's working correctly.
- If the LED remains green or blinks three times every five seconds, that means the device has been disconnected from the touchscreen. To resolve this state, contact support at 1-800-XFINITY.
Additional information
Visit our Online Support Center to find common solutions.
The easiest way to activate, manage, and troubleshoot your Xfinity experience is with the Xfinity app! Get 24/7 real-time support, pay your bill, view plan details, get outage updates, and more. Download the free Xfinity app, or scan the QR code with your smartphone.
Need additional support? Ask Xfinity Assistant.
