Our technician here at firealarm.com recommends starting with a few basic troubleshooting steps. First, ensure that the device is properly connected to power and that there are no loose connections. Check if there are any visible signs of damage or debris obstructing the sensor. Next, try resetting the device by power cycling it. If the issue persists, consult the user manual for further troubleshooting guidance or consider contacting a certified technician for assistance.