- Ensure the panel is disarmed.
- Open the sensor by prying open the cover from the bottom using a flat-head screwdriver (or small coin).
- Replace the battery with a CR-123A battery.
- Fully close the sensor, pressing down on the bottom corners to ensure it snaps into place.
- Check the panel to ensure the error has cleared, if not replace the sensor battery.
If the error persists, please call our Account Specialists at 855-238-4826 for further assistance.