Motion Sensor Light Turns On and Off Repeatedly: Troubleshooting and Fixes

The most common issue that individuals face while employing motion sensor light is the possibility that the light will be able to start flickering or switch on and off all in a flash and make the light inaccessible. It is frustrating and at times, to be annoyed when no option can turn the light’s motion off on its own. The defective motion sensor lights turn on will keep running all day, unless you unplug the fixture. The light’s flashing could trigger seizures later on that can ultimately harm our overall health. Motion sensor light turns on and off repeatedly.

The good news is that flickering and flashing issues are rare to notice, and the majority problems are simple to resolve in a matter of time. In this article we’ll explain the reason the reason why a light from a motion sensor light can flash or flicker and what you can do to resolve the issue.

Light Is Flickering or Blinking

The blinking or flickering of light is a flashing of light that is usually unstable and can vary in its brightness. When an LED for motion sensors is flashing, it’s no connection to the sensor. If a light is flickering it is usually it is because something is that is wrong with the lighting fixture, the light bulb or even a broken connection.

Loose Wiring & Connection

A light bulb that has become loose is the most common reason that could produce light flickering. In the absence of a proper connection between the socket and light bulb it is unable to receive an uninterrupted electrical power source from which to draw. A loose connection between the light bulb and socket is the simplest to repair by making sure the bulb is tightened.

Shut off the power supply to the defective light. allow that the lamp to cool to a comfortable temperature. You should also wear gloves to shield your hands from the heat, and finally tighten the bulb.

Additionally, poor wiring around your home can cause flickering lights also. Broken or damaged wall switches, as well as loose wiring could all cause flickering light. These can be one of the primary cause of fires in your home that are not to be ignored.

If you aren’t sure where to find the loose wires in your home contact an electrician thoroughly examine the house.

Faulty Light Bulb, Fixture, or Circuit

This could be the first motive that pops into our minds whenever we see an electric light blinking. Something is wrong. The light fixture, bulb or electric circuit may be faulty and go out of service. damaged after a lengthy period of regular use.

It’s not an simple way of determining what is causing the light to flash. Try replacing a bulb to determine if it can stop the blinking. If you find the issue it is possible to consider replacing the entire light fixture by replacing it with a functioning light fixture and see how long the new light blinks. If you are still experiencing the problem when you replace the light fixture contact a professional electrician to look over the circuit for any possible cause.

Voltage Fluctuations

The fluctuation in voltage could cause an LED light that flickers. A drop and spike in power will result in the LED light to increase in brightness and decrease in dimness because of temperature changes in the way the LED light functions.

LED light bulbs do not utilize the filament to produce light. Instead, they employ an electronic driver for illumination, meaning that variations in voltage will cause a change in the brightness of LED light bulbs. While incandescent lights light up through heating the filament, resulting in lighting, therefore these voltage fluctuations won’t instantaneously result heat changes in flashing light for incandescent bulbs.

If you’re using several appliances simultaneously the LEDs may flicker when you switch an electrical appliance off or on this can result in the voltage to rise.

If the fluctuation in voltage is the primary reason for the light of your LED motion sensor light to blink, replace it with a light bulb that is not LED. This isn’t the most ideal solution but it does solve the issue.

Dimming switches

In general, we don’t employ Dimmer switches in conjunction with motion sensor light. However, if you do older dimmer switches, they’re made for light bulbs that are incandescent and are not compatible when used with LED lighting, and could result in flickering.

If the dimmer switch you have has become worn out, it could be the cause of the light you are using is flickering. The easiest solution is to upgrade the dimmer switch to the latest model to solve the issue of flickering. New dimmer switches should function effectively with LED light bulbs.

Light Is Turning On and Off Repeatedly

The term “flashing” refers to a flash of light that briefly illuminates an area, and can refer to the motion sensor light that turns between on and off. In contrast to flickering, when a motion sensor light flashes the fixture has a good working condition.

The reason why a motion sensor light begins to flash is because it is in a position to sense motion irregularly and cause the light to go off and then turn back on. The reason for this is usually because of a wrong configuration of the sensor which causes frequent triggering which is easily corrected by adjusting the lighting.

In the event of a problem that cannot be solved A quick solution is setting the low sensitivity of the sensor to high, and the maximum delay, such as 30 minutes. The solution isn’t a perfect one. issue, but it could aid in determining the possibility that light flickering is a cause or damage to the motion sensor light initially. If the problem with flickering disappears it is possible to concentrate on changing the settings of the motion sensor. This could also serve as a short-term “fix” to stop the lights from switching off repeatedly and over.

Test Mode

Most outdoor motion sensor lights come with an option for testers to modify the settings upon the initial installation. If you test the mode it will rapidly shut off when activated and users won’t need to wait for a long period before the light goes off before experimenting with other settings as well as locations. It is recommended to enter test mode first, before adjusting any various setting.

The user can switch to test mode when they select “test” or “test mode” within the settings for timers located on the back of the motion sensor. The test mode resembles to a short interval of between 5 and 10 seconds, for testing purposes.

In the case of some indoor motion sensor lights and lighting models which don’t have the test mode for outdoor motion sensor lights You can choose the most minimal timer settings for around 30 seconds, which will make the light go out immediately after the light is turned on.

Test mode might be another of the causes for why the motion light turns between on and off, because of the time limit. Some people may not remember to end test mode once they have completed their initial tests.

On Time Duration

The on-time setting, also known as the time duration or time delay setting regulates the length of time the sensor’s light stays on following the time initiated by a moving object. If the sensor light goes off too quickly the setting for the on-time is too short. could be the primary cause.

If you put a brief time limit of 10 seconds for your motion sensor light and your light will go out of commission very fast when it is unable to detect movement after 10 seconds. An extremely low sensor sensitivity and short duration of time is likely to cause the light to stop working frequently. By choosing a setting for a middle time that is 10 minutes will resolve the issue completely.

Sensitivity Setting

The intensity of a motion sensor light may determine how much and how sensitive the motion detector can detect signals from motion.

When the sensitivity of a sensor is excessively high it could detect motion signals that are not within the area of detection, or the light could get stimulated by objects that are small and moving. If there aren’t persons in the vicinity, the sensor may sense capture motion signals that are not human and activate. If the motion sensor lights often on, make sure you reduce the sensor sensitivity of light sensors on your device to minimize the chance of false-on.

If the low sensitivity is inadequate and the light from the motion sensor could not detect current capture motion signals within the sensor zone promptly. So it is possible that the sensor light could turn off thinking that the space is vacant, even though the area is being used by humans. If your sensor’s lights are frequently off, make sure you adjust the brightness to decrease the error of turning off.

Sensor Position

In reality the position of the motion sensor is essential to obtaining an accurate motion detection result however, many aren’t paying enough focus on adjusting the amount pir motion sensor lights after the installation. In the absence of proper adjustments the light from the motion sensor may turn off excessively or stop in a hurry.

These are some helpful tips aiding you in optimizing and move your sensor to get maximum performance.

Away From Heat Sources

Motion sensor light bulbs for PIR can be sensitive to thermal signal and changes in heat since PIR motion sensors sense the infrared signals thermal signals, that are released by hot, moving objects. A temperature change could make a PIR motion sensor to switch on the lights.

If installing lights that are motion-activated equipped with a PIR motion sensor, it is recommended to put the light in a location away from heating sources like air conditioners. They should also place the light close to windows where warm breeze from outside the window can be interpreted as a temperature change.

If you are unable to remove the light off of nearby sources of heat following installation, you should at the very minimum, turn the motion sensor into a different direction, so it’s away from sources of heat.

Point to the Detection Area

In adjusting or repositioning your motion sensor, the most important rule to follow is to make sure the motion sensor is capable of covering the space in which you would like it to cover. In the absence of this, any motion thing outside the region could be a trigger for the lights to come off, including vehicles or wild animals it appears that your sensor’s light appears to be on in the middle of nowhere.

A different thing to consider is that motion sensor lighting is better in detecting movement across the sensor than toward the sensor. When someone walks toward or away from the sensor, the PIR sensors may be unable to detect the motion. Therefore, it is important to put the lights in the correct spots to ensure the highest results.

Restrict the Detection Range

If repositioning the motion sensor isn’t enough to reduce its detection area it is possible to reduce its detection angle further to limit its range. A motion sensor may have a wide detecting range of 180 ° to 360 degrees angle in view based on the method used it’s placed and the location.

As with adjusting the motion sensor’s light switch you could use tapes to block the lens of your motion sensor to limit its range of view. They act like a blinder which is a cover for the motion sensor to block it from receiving signals coming from specific directions. This further forces the sensor to scan only a narrow, small area.

Clean the Sensor

The most common thing people do not think about is regularly cleaning the motion sensor. This is especially important for outside security light. Dirt, dusk, as well as spider webs, can obscure the motion sensor which can reduce its capacity to detect movement. A medium-sized spider is large enough to cause the motion sensor to turn on the LED when it is in the vicinity of or crosses it.

If your light is constantly switching on and off It’s extremely beneficial to maintain your motion sensor light clear and free of any obstructions that surround the lens to ensure the best accuracy of the detection.


Thank you for overcoming the issue, and having the light on your motion sensor returning to its normal state. Make sure to quit the test mode, and then select an appropriate timer setting that will match your everyday routine.

If the issue persists the electronic component likely ran through some glitches. The pir motion sensor light to its default setting and then take it back for a second try.

If the reset method isn’t enough to resolve the problem, then the electronic components inside your light could be forever damaged. We suggest purchasing a replacement motion sensor light and swapping out the previous one which is less expensive than calling an expert to repair the light once you’ve used the techniques above.


Why does my motion keep turning on and off?

The motion sensor lights are turned off due to the lack of a visible image of the sensor so it can only be detected only intermittently.

Why is my motion sensor light blinking on and off?

There are a variety of possible explanations given: loose connections and Connections that are loose on fixtures could create flicker. Check your connections and take precautions. Troublesome bulbs are usually due to defective lamps. They also could flicker.

Why does my sensor light keep coming on when there is nothing there?

If your motion sensor does not possess a particular angle it could be possible to hear the sound of your dog or cat or even the chill at your front door, which can trigger motion sensor lights with PIR.

How do you reset an outdoor motion sensor light?

The lights should be turned either off or on rapidly by hitting each switch four times. If the lights come on then close the switch and switch it back on for 5-10 minutes. The last night side light will turn inactive and the motion sensor lights is reset.

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