This article is about the Original SimpliSafe system. If you purchased a new system in 2018 or later, you likely have the All-New SimpliSafe. If you're not certain which system you have, you can tell the difference here.
If you are consistently seeing a warning that one of your Entry Sensors is open, despite all of your doors and windows being closed, one of the following items is likely the cause:
- Your Entry Sensor is too far away from its corresponding magnet piece.
- Your Entry Sensor (or its corresponding magnet) is placed on a metallic surface, and the magnet is consequently not working correctly with the Entry Sensor itself.
Make sure that your Entry Sensor and its magnet are never more than 2 inches apart. It’s best to keep the two pieces as close together as possible. If the door/window where this issue is occurring is metal, place a buffer between the magnet (the smaller part of the sensor) and the door. We recommend using an extra adhesive or two.
If these tips do not help resolve your issue, please contact our customer support team directly for further assistance.