Arlo Camera Not Detecting Motion

When an Arlo camera stops detecting motion, check app modes, motion settings, placement, and power before resetting the system.

How Arlo Motion Detection Actually Works

Before chasing settings, it helps to know what your Arlo camera looks for when it watches an area. Most wireless Arlo models use a passive infrared sensor that reacts to heat movement, not just any visual change in the picture.

The sensor reacts best when a warm object such as a person moves across the field of view, especially sideways across the frame. Straight line movement directly toward the lens can be harder to pick up. Distance matters as well; motion at the far edge of the rated range can slip past without a trigger.

Glass, mirrors, and some plastics block or weaken infrared signals. That is why an Arlo aimed through a window might show live video but stay silent when someone walks outside. Strong sunlight, car headlights, and busy streets can confuse the sensor or cause you to dial sensitivity down too far, which later makes motion alerts stop.

Modes in the Arlo Secure app decide when the camera should react. Armed, Disarmed, Schedule, and custom modes each carry their own rules, so one camera can watch a driveway at night while another relaxes during the day. If a mode rule disables motion detection or recording, the camera can sit there online and healthy yet never save a clip.

Common Causes Of Arlo Camera Not Detecting Motion

When someone says an arlo camera not detecting motion used to work and now feels blind, the cause usually falls into a short list. Starting with the basics saves time and can prevent a full reset later on.

Camera offline or low battery — A camera that dropped from Wi-Fi or has a nearly empty battery can show as present in the app yet fail to watch for activity in real time.
Mode or rule disables motion — A schedule change, temporary quiet mode, or rule edit can quietly switch motion detection or recording off for that camera.
Sensitivity set too low — Sliding sensitivity down to reduce false alerts from cars or trees often means people near the edge of the frame no longer trigger clips.
Camera aimed through glass — An indoor camera pointed out of a window can stream live video, while the motion sensor never reacts because infrared waves cannot pass through the glass well.
Mounting height or distance issues — A camera mounted too high, too low, or too far from the walkway might only catch the top of a head or a tiny figure that the sensor does not treat as strong movement.
Outdated firmware or app — Old firmware or a stale app release can cause odd bugs where clips stop while the camera still sends live video.
Account, hub, or service glitches — A base station stuck after a power cut, a routine that lost its link to a device, or a rare service outage can all pause motion events until things refresh.

Quick Checks Inside The Arlo Secure App

Many motion issues come from one or two settings inside the app. A short settings sweep can bring motion alerts back without touching the hardware on the wall.

Confirm the camera is online — Open the app, tap the camera, and start a live view. If live video fails or freezes, fix the network or power first, then return to motion troubleshooting.
Check the active mode and rules — Open Routines, check which mode should record from this camera, then confirm the rule has motion detection turned on and that recording or notifications are set as actions.
Run a motion detection test — Many Arlo models include a Motion Detection Test tool. Turn it on, walk through the scene, and watch for the test light or indicator in the app to flash when you move.
Raise motion sensitivity step by step — If the test works only when you walk very close, move the sensitivity slider a little higher, then repeat the walk test until motion triggers at a sensible distance.
Confirm notifications and email alerts — In the rule settings, make sure push alerts or email alerts are selected. Then confirm phone notification permissions for the Arlo app are allowed in the phone system menu.
Check activity zones on wired models — If the camera offers activity zones, draw the zone so it surrounds the doorway or path you care about; motion outside that shape will not trigger clips.

Quick tip: If you have several cameras, test one at a time. That way you know whether the motion issue is tied to one device, one rule, or the account as a whole.

Fixing Placement And Hardware Problems

Even perfect app settings cannot help a camera that simply cannot sense motion in the right area. A few physical changes often breathe new life into a quiet camera.

Remove glass and obstructions — Move indoor cameras away from windows and clear plants, flags, or other objects that swing right in front of the lens.
Adjust height and angle — Mount most Arlo cameras around seven to ten feet high and angle them so that motion crosses the frame rather than moving straight toward the lens.
Shorten the distance to the action — Bring the camera closer to the doorway, path, or garage where people or cars pass. Motion near the center of the rated range triggers more reliably than motion at the far edge.
Avoid very hot or very bright spots — Direct sun, shiny water, or reflections from windshields can confuse the sensor and reduce contrast. Aim slightly away from these trouble spots where possible.
Check the mount and housing — A loose mount can shake in the wind, which pushes people out of the ideal detection zone. Tighten brackets and check that skins or protective housings do not block the sensor window.

Say the camera sits over a driveway where cars pass all day. Many owners lower sensitivity to cut down on constant alerts, only to find that people walking near the far edge no longer count as strong motion. A small adjustment to the viewing angle so cars sit partly outside the frame lets you raise sensitivity again and bring back the alerts you actually care about.

Deeper Fixes When Motion Still Will Not Trigger

If the camera shows live video, app settings look correct, and placement suits the scene, yet motion events still stop, you are dealing with an arlo camera not detecting motion that needs deeper software and account checks. This stage takes a bit more time, though it often clears invisible glitches that ordinary settings changes never touch.

Reboot camera and hub — For battery models, remove the battery for twenty to thirty seconds, then reinstall it. For wired models, disconnect power for a short time, then plug back in. Give each device a minute or two to reconnect.
Restart routers and mesh nodes — A tired router can leave the camera online yet slow to react. A clean restart improves Wi-Fi stability and hands the camera a fresh session.
Update firmware and app — In the app, open device settings and check for firmware updates. Then visit your phone platform store to make sure the Arlo Secure app itself runs the newest version.
Review recent routine or integration changes — Changes to voice assistant routines, smart home rules, or time based schedules can cut motion events off from recording steps while the camera still detects motion internally.
Test with a simple Armed mode — Set the system to a plain Armed mode where every motion event should record a clip. Walk past the camera and see whether clips appear in the Feed. If that works, rebuild any complex custom mode from scratch.
Remove and re-add a single camera — As a last resort for one device, remove it from the app, factory reset it using the sync or reset button, then add it back. This can clear corrupted links between the camera, base station, and account.

On rare days an Arlo camera that ignores motion might link to a wider service issue rather than a local fault. If you can view live video yet no cameras on the account create clips or alerts, check the Arlo status page in a browser. When that page shows an outage, most fixes can wait until service returns.

How To Test Arlo Motion Detection Reliably

Once you adjust placement, modes, and sensitivity, a structured test shows whether motion detection now behaves as expected. Instead of walking around randomly and hoping a clip appears, use a simple pattern and adjust one setting at a time.

Pick a clear walking path — Choose the route that matters most, such as the walk up to the front door or the path to the mailbox.
Stand at the far edge of the scene — Start near the edge of the live view frame, where motion detection is usually weakest, then walk across the frame at a steady pace.
Check the Feed after each pass — Wait a short moment, then open the Feed and confirm that a motion clip appears with the right time stamp.
Adjust one setting at a time — Raise sensitivity slightly, shift the angle, or move the camera a little lower, then repeat the same walk so you can compare results.
Repeat under day and night light — Run tests in bright daytime light and again after dark so you know how the camera behaves with infrared night vision enabled.

Typical Arlo Motion Problems And Fast Fixes

The table below groups the most common motion problems with fixes you can carry out without climbing a ladder more than once.

Symptom	Likely Cause	Fast Fix
No clips, no alerts, live view works	Mode or rule disabled motion or recording	Use Armed mode or rebuild rules so motion triggers clips again
Clips only when someone walks very close	Sensitivity too low or camera too far away	Raise sensitivity in small steps and move camera nearer to the action
Camera sees cars but misses people	Camera aimed straight at street traffic	Shift angle so cars sit partly outside frame and people cross the field of view
Motion never triggers through a window	Infrared sensor blocked by glass	Move camera outside or inside at an angle that does not rely on motion through glass
All cameras stop recording at once	Hub, account, or service problem	Reboot base station and router and check the Arlo service status page

Once you know which row matches your situation, you can return to the earlier sections and concentrate on the matching fixes instead of changing every setting at random. That keeps motion alerts dependable.