How to Fix a Sensor Malfunction on the DW20-345 Recessed Door Contact

Summary: This article provides troubleshooting steps for resolving sensor malfunctions on the DW20-345 Recessed Door Contact. Issues may include low battery, misalignment, or poor signal strength.

Common Causes of Malfunctions

• Low Battery: The sensor may not function properly if the battery is drained or installed incorrectly.
• Signal Interference: Walls, appliances, or large metal objects can weaken the signal between the sensor and the panel.
• Misalignment: The sensor and its magnet must be properly aligned to detect door movement.

Step-by-Step Troubleshooting

1. Check and Replace the Battery:
   1. Remove the sensor from the recessed position in the door frame.
   2. Inspect the battery for signs of damage or corrosion.
   3. Replace the battery with a fresh CR2 3-volt lithium battery, ensuring proper orientation.
   4. Reinsert the sensor into the door frame and test functionality.
2. Check Sensor Alignment:
   1. Ensure the sensor and magnet are positioned within 1/4 inch of each other when the door is closed.
   2. If they are misaligned, adjust the magnet or sensor placement as needed.
3. Test Signal Strength:
   1. Open the Brinks Home app and navigate to the sensor's details page.
   2. Check the signal strength reading. If it is below 80%, consider relocating the panel or installing a signal repeater.
4. Power Cycle the Panel:
   1. If issues persist, power down your control panel and restart it after 2 minutes.
   2. Test the sensor again to verify functionality.
5. Reset the Sensor:
   1. Remove the sensor from your panel through the Brinks Home app or your control panel interface.
   2. Follow the pairing instructions to re-add the sensor to your system.

Further Assistance

If the sensor malfunction persists after following these steps, contact Brinks Home support for additional troubleshooting or to schedule a technician visit.