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Motion Sensor Light Blinks 3 Times

Let’s say that the motion sensor light always blinks three times quite often, then the initial reaction is to think that there is something wrong with it. But don’t worry because it’s nothing that serious. The cause is usually something that’s pretty minor and the solution is quick and simple.

As long as you follow our guide on how to approach and fix your motion sensor lights, you should have it back up and running in no time.

Why Motion Sensor Lights Blink Often and Recommended Ways to Fix Them

The first step is to first diagnose the problem. There are a wide range of reasons as to why your sensor light blinks on and off but we’ll give you the most common ones. Diagnosing the reason will also help you prevent instances like these in the future.

That said, here are the main reasons as to why you may have this problem:

  • Accidental Settings

The first possible cause of the blinking light problem is settings. There’s always that possibility that you accidentally changed the settings without you knowing. Of course, if that’s the problem, then the solution is pretty easy. But more on that later. Let’s finish all the possible problems first.

  • Motion Sensor Defect or Angle

If your settings are at default, then the problem could lie within the motion sensor. Either there’s a defect or the angle is in an awkward position where your sensor detects something that isn’t even there.

  • Bulb Problems

If that isn’t the problem, then maybe you might want to check the bulb. A sign that the bulb is about to bust is a flickering light. So, if your motion sensor light is flashing, then it probably means you need to change your bulb as soon as you can.

  • Wiring Issue

Last is a wiring issue. The problem could be a connection issue with the wiring of the bulb and the fixture. It’s either the wire is loose or probably not working anymore.

Now that we’re done with the causes, we now can move on to the solutions. In order to know the solutions, we just need to go back to the causes and address them one by one. Check them out below:

  • Put the Settings to Default

If an accidental configuration is the problem, simply follow the instructions in your manual to reset the settings. This should solve the problem. This is the very first thing that you should try before you go to the other solutions.

  • Change the Angle

Another thing you can do is try to change the angle. The angling of your light may prompt it to detect something that’s not there. Thus, what you can do is try to angle it in another direction.

  • Change the Bulb

Of course, you can always change the bulb. As we mentioned above, an almost-busted bulb can also be the cause. Therefore, the solution here is to change the bulb.

  • Loose Wiring

Another thing you may want to do is check the wiring. Is there a loose wire connecting the bulb and the fixture? Go check if there is and try to tighten it.

  • Replace the Sensor

Lastly, there is the issue of the sensor being faulty. If you have tried all of these methods and nothing seems to have worked, then there is a chance that the sensor is not working well. What you can do is try to get the sensor checked to see if there are any problems. In worst case scenarios, you may even want to get your sensor replaced.

Now, you may be wondering if these diagnosis tips are exclusive to just one type of light. Luckily, all motion sensor lights are more or less alike. Whether you’re using a LED light for growing in a greenhouse or a ring light for streaming, the mechanisms are all the same. That’s why you can use the methods in our guide with all motion sensor lights.


The next time your motion sensor light blinks 3 times, just remember that you have a handy guide to help you out. Don’t hesitate to refer back to this guide every time this problem happens. It is a common problem but it’s not something that’s hard to address.

Hope we were able to help you out!