Lorex Camera Motion Detection Not Working or Too Many False Alerts

Problem Description

Your Lorex security camera does not detect motion events, misses recording triggers, or sends excessive false alerts from trees, shadows, vehicles, or weather. Lorex motion detection relies on pixel-change analysis and optional AI detection — either the detection zones are not covering the right areas, the sensitivity is miscalibrated, or AI filtering settings are not correctly configured for your scene.

Why This Happens in Real Homes

Almost every Lorex false alert complaint comes down to using generic pixel-change motion detection instead of AI person/vehicle detection. Once AI detection is turned on and generic motion is turned off, false alerts typically drop by 90 percent or more. The second most common issue is nighttime IR reflection — if a wall or eave is within 3 feet of the camera, the IR bounces back and every bug or raindrop triggers an alert. Angle the camera down and away from the surface.

Symptoms

• No motion recordings despite activity
• Dozens of false alerts daily from trees or headlights
• Person detection not working correctly
• Motion zones not being respected
• Push notifications delayed by minutes
• Motion recordings too short, missing the event
• False alerts from rain, snow, or bugs
• Only some cameras detect motion

Recognize these? Here's what usually causes it.

Common Causes

• Motion sensitivity too low (missed events)
• Motion sensitivity too high (false alerts)
• Detection zones not configured
• Smart (person/vehicle) detection not enabled
• Camera angle too wide, capturing irrelevant areas
• Recording schedule conflicts
• Nuisance sources in frame (road, trees, flag)
• IR-lit bugs/spider webs triggering at night

Tools & Requirements

Step-by-Step Solution

1

Turn on AI Person and Vehicle Detection first

This is the single most impactful fix. Go to your Lorex NVR or app, open the camera settings, find Smart Detection or AI Detection, and enable Person Detection and Vehicle Detection. This uses AI to filter out trees, shadows, rain, and bugs. Most Lorex cameras made after 2020 support this. Once enabled, you can turn off generic motion detection entirely and only get alerts for actual people and vehicles.

2

Draw tight motion detection zones around areas that matter

In the motion detection settings, draw zones that cover only your driveway, walkway, porch, or entry points. Exclude the street, trees, and sky. A camera pointed at a busy road with the full frame as a detection zone will send hundreds of false alerts from passing cars and headlight reflections. Tight zones fix this immediately.

3

Lower sensitivity to 50-60 percent for outdoor cameras

Outdoor cameras almost never need sensitivity above 60 percent. High sensitivity triggers on wind-blown leaves, rain, shadows moving across the ground, and even clouds. Start at 50 percent, test for a day, and increase by 5-10 percent if you are missing actual events. For indoor cameras, 70-80 percent is usually fine since there is less environmental motion.

4

Check for IR reflection causing nighttime false alerts

If false alerts only happen at night, the infrared LEDs are probably reflecting off something close to the camera — a wall, eave, railing, or nearby branch. The camera sees this constant bright reflection and triggers on any movement in it (insects, rain, dust). Reposition the camera so nothing is within 3 feet of the lens, or angle it slightly downward away from the reflective surface.

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5

Set different schedules for day and night detection

If your camera supports scheduling, set higher sensitivity during the day and lower at night (when bugs and IR reflection are worse). Some Lorex NVRs also let you set different detection zones for day and night — use a tighter zone at night to avoid IR hotspot areas.

6

Update NVR and camera firmware

Lorex regularly improves AI detection accuracy through firmware. Log into your NVR, go to System > Firmware, and check for updates. Update the NVR first, then each camera. If your cameras did not previously have AI detection, a firmware update may add it. After updating, re-enable your detection settings and test.

7

Check recording settings if motion events are too short

If your recordings cut off before the event is over, increase the post-motion recording time. Go to Recording Schedule settings and increase the post-record duration from the default (usually 10 seconds) to 30-60 seconds. This ensures you capture the full event, not just the first few seconds of motion.

Quick Solutions

Still having issues? This is usually the deeper cause below.

Need More Help? Lorex Support

Note: The contact information below connects you directly to Lorex's official customer support team, not Trunetto. They can help with warranty claims, device replacements, and advanced technical issues.