The Door and Window sensor is looking for a ¾ inch or greater separation between the transmitter and magnet for it to trigger an alarm. Check the following if your sensor has triggered a false alarm:
- Ensure both the transmitter and magnet are still present on the door/window or frame
- Be sure to verify when the door is closed that the arrows on the two pieces are perfectly aligned, within a thumb’s width and flush
- Ensure there is no play (movement) in the door or window when it is closed
- Ensure that the notches are lined up directly across from each other
If you’ve confirmed mounting is correct and the issue is not resolved, please contact Customer Support for further troubleshooting assistance.