They’re great for security, helping to deter intruders who don’t want to be spotted, and they’re helpful if you arrive home during bad weather and need to spot any icy patches on your porch.
If your motion light resembles a strobe light, or it’s just switching on regularly when you can’t see anything that should be triggering it, it can be highly annoying.
A motion light switching on and off could be due to many reasons. Incompatible LED bulbs are common, but also, the sensor may be faulty or damaged power bumps, or even spiders. Try changing the bulb, resetting the sensitivity, or replacing the sensor if nothing else works.
Reasons And Fixes For Your Motion Sensor Light Turning On By Itself
Is the light in your motion sensor circuit constantly flickering on and off? Or is it turning on occasionally when it shouldn’t?
Because a faulty sensor can make your light switch on too frequently, but it can’t then turn the bulb off so fast to cause it to flicker.
With flickering, it’s either going to be a problem with the circuit, the bulb, or the connection between the bulb and the fitting.
How To Stop A Motion Sensor Light From Turning Off (4 Ways!)
If there’s any debris, or it’s just not been installed correctly, it could flicker as it keeps hitting and then losing the connection.
Modern motion sensors are often incompatible with certain LED bulbs because their constant power draw then causes the bulb to switch on and off if it’s wired in-line in the circuit.
Now, what about when it’s not that your light is flickering, but it keeps turning on and off every now and then when it shouldn’t?
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Yours might be on one, which means it is triggered from even the slightest movement in a room, something that you’re barely aware of.
They do this so that the swaying of a branch in view won’t cause the light to come on for no reason.
Alternatively, make it more sensitive so that even a tiny change in the field of view will spark the sensor into life.
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Say you have a standard toggle switch installed with a motion sensor, every time you flip it on after being turned off, the sensitivity will have changed to the following setting.
Ultimately you need to check how your motion detector works and determine if switching it off and on will alter the sensitivity.
Check the manual for your specific motion detector – it might have a sliding control on the sensor itself, or it may need you to reset it by powering it off for thirty seconds.
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If there are spider webs around the sensor, give it a good clean along with the area around it, and consider swapping to a PIF sensor that detects heat.
There’s a good chance it’s being caused by power bumps on the circuit, which will mean you’ll need to upgrade your sensor to a better quality one.
It’s rare to find this level of detail on a product page on a website, so just look for branded sensors with positive, genuine reviews, so you know you’re getting a reliable sensor.
How To Adjust Your Sensor Light
Replacing your sensor will solve the issue if it’s a cheaper one that can’t handle power fluctuations or if it has been damaged.
Have you had problems with motion sensors causing your lights to constantly switch on when they don’t need to? How did you solve it?
Hi, I am Eugen. I was always one of those kids who had all sorts of weird lighting gadgets for every occasion.
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Now, I want to share my knowledge and experience about lighting with you on LED Lighting Info. You can read more about me here.Motion-activated lights are one of the best lighting solutions for modern homes. The best energy-saving is to avoid the power not needed and not used entirely. The motion sensor lights can handle that perfectly for us by turning off the lights automatically when one leaves the room.
Whether you are using a motion sensor light switch, an occupancy sensor, or a motion sensor light, they are all for the same purpose to automatically handle the light’s ON and OFF for you, and they all work in a very similar way.
During our daily usage, the motion sensor lights might run into some problems, which might cause noticeable inconvenience to us. Unlike regular light switches, which are mechanical and manual controlled that are very durable and stable, the motion sensor light switches contain electric components such as the motion sensor and IC circuits for controlling the light, which is more fragile to external sources like man-made mistakes and power surges.
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But don’t worry, the motion sensor light switches can be highly durable as well, especially the PIR motion sensor based switches. Most of the time, the problems are caused due to improper man-made adjustments that look like a fault or error but can be quickly fixed.
In this guide, we are going to explain why your motion sensor lights keep coming on and won’t turn off. Whether you are using a motion sensor light switch, an individual occupancy motion sensor, or a motion sensor light such as night lights or strip lights, you can all refer to this guide because the causes and symptoms are somehow identical.
When your motion sensor lights keep coming on and won’t turn off happens after the initial installation, it’s usually because of a lack of proper adjustment to the motion sensor.
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A common misunderstanding of a PIR motion sensor, which is the most widely used type of sensor, is that a PIR motion sensor does not literally detect you by movement or “motion” but detects your presence by the heat/infrared emitted from your warm body.
We’ve seen quite a few people testing the motion sensor by standing aside, waiting for the light to turn off and complaining the lights keep on without turning off. It’s highly possible that the motion sensor can still detect you with its wide 180 degrees of detection range. Sometimes, your body heat can reflect from mirrors and still be seen by the motion sensor even when you’re standing behind the sensor.
To test the motion sensor light’s functionality, you should leave the interior room or stay far away from the motion sensor to ensure it cannot detect your body heat completely.
How To Fix Your “check Engine” Light
Another common mistake causing this problem is that people do not adjust the motion sensor after installation. Whether a motion sensor light switch on the wall, an occupancy sensor on the ceiling or a motion sensor light with the motion sensor built-in, it’s the same component- PIR motion sensor- that detects motion.
The PIR motion sensor’s detection range is fan-shape, 150 to 180 degrees wide and with a detection distance from 10 to 30 feet. So it’s crucial to adjust the motion sensor’s detection window, or known as the lens, to face and points right to the detection area, such as your front door or pathway.
When the motion sensor is not facing the right direction, it might be able to collect the signal from all possible sources such as your dogs and cats, HVAC or the hot wind from your window, which may all trigger a PIR motion sensor as a valid “motion” to keep the light on.
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Adjust the motion sensor to face the desired direction that it can cover and only cover the detection area, so the motion sensor can effectively receive the IR signals and not get distracted by noise sources.
When installing a motion sensor or a motion sensor switch to an existing regular light, the light may still be able to turn on with the wrong wirings, but it cannot automatically turn off.
The motion sensor is supposed to connect to the light’s load wire, so it can decide when to send power to the light or not, in order to control the light’s on or off.
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If the hotwire wires to the light’s load wire, the light is directly powered by your home source, and the motion sensor is bypassed and will not work at all.
Re-check the wirings of your motion sensor light switch or occupancy/vacancy motion sensor to ensure the wirings is correct and the same as the manufacturer’s instructions.
You can follow our guide on how to wire a motion sensor to an existing light or how to install a light switch for more information.
Using A Motion Sensor Light Switch
The time delay is how long the light is still remained on after the motion sensor cannot detect any people in the area. In this case, if the default time delay is relatively long, such as 15 minutes, the motion sensor light might keep on after you have left the area and seem like it does not turn off.
Additionally, as long as the motion sensor detects any motion again during the time delay, the time delay will reset and start counting from the beginning again.
It’s a high chance that the motion sensor has been continuously detecting motion now and then before the time delay expires, so the light keeps ON, the time delay resets and the circle repeats.
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Set the minimal time delay and see if your motion sensor light turns off by itself. If the delay is the issue, you can try and select different preset time-delay until you find the best value for your application.
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