How to Reset a Motion Detector Flood Light When It’s Not Working Properly

Motion sensor lights are ideal when you arrive home late at night or need security lights to ward off would-be intruders and pests. But as with all technology, sometimes motion sensors malfunction. This guide will walk you through how to reset a motion detector floodlight when it stops working as it should. Often, the solution is as simple as a few troubleshooting steps.

When to Reset Motion Sensor Lights 

When your motion detector flood light stops working, a quick reset is often all that's needed to get it working again. Try resetting in the following scenarios: 

• The light won't turn on, even when large moving objects like people or cars pass by.

• The light stays on, even when no motion has occurred for long periods.

• The light is inconsistent and doesn't always detect motion when it should.

• The light seems less sensitive than usual.

When troubleshooting your motion detector light, consult the owner's manual for the device to look for solutions outside of the steps we’ve provided below.

Main Reasons for Motion Detector Issues

Motion detector flood lights enhance home security, but even the best models can malfunction. Multiple factors could be impacting a motion detector’s performance, including: 

• Low battery: If you have a battery-operated motion detector flood light, check if the battery needs recharging or replacing. A weak or dead battery can cause false alarms or total darkness.

• Misalignment: If your motion detector isn’t catching movement, it could just be misaligned. Make sure it’s aimed at the right area for the best coverage.  

• Obstructions: Trees and outdoor furniture can block your motion detector’s view. Clear away any obstructions so the sensor has a clear line of sight.

• Electrical issues: If you’re having problems with your motion detector lights, check the wiring and connections for damage and corrosion. Loose connections can disrupt power, and faulty wiring isn’t just frustrating—it can pose a fire risk.

• Environmental factors: Heavy rain, snow, and even extreme temperatures can mess with the performance of your motion detector flood lights. Make sure your detector is rated for outdoor use and check it for signs of water damage. 

• Wear and tear: Motion detector sensors wear down over time from weather and regular use. Make it a habit to inspect your detector regularly. And if it’s starting to show its age, replace it.

• Improper wiring: Incorrect installation and improper wiring can cause motion detector flood lights to malfunction. To fix this, double-check its connections against the manufacturer’s guidelines. If you don’t trust your DIY skills, leave the job to a professional.

DIY vs. Hiring a Pro 

If none of the steps above fix your motion detector flood light, simply resetting the light likely isn’t the solution. If your light isn’t coming on at all, you can try swapping in a new light bulb for $2 to $30.

If your light was installed by a home security company near you, give them a call and have them send out a technician to troubleshoot the issue. The issue you're experiencing may be internal, such as a burnt wire, and could be dangerous to attempt to fix on your own. If replacement is necessary, expect to pay $75 to $250 for the cost of a motion sensor light.