Replace Your Old Sensors
If youre still seeing the yellow light on your garage door sensor even after cleaning the lenses, realigning them, reconnecting/replacing sensor wiring, moving objects out of the way AND contacting support, then its time to buy new sensors.
There are countless possible reasons your old sensors stopped working time, overuse, exposure to harsh weather, etc. Regardless of the reason, your old sensors need to be replaced.
To start, go online, or to your nearest home improvement store and buy a replacement pair. Make sure the new sensors are compatible with your model garage door opener.
Once you have your new, compatible garage door sensors, youll need to install them. To install your new sensors, follow these steps.
Door track installation:
Installation without pre-wiring:
Pre-wired installation:
Possible Causes Of Garage Door Sensors Malfunction
Just like any other highly programmed component, garage door sensors can get faulty. Here are common causes of garage door sensors problems:
- Lack of power supply- Garage door sensors are an electric component that requires a power supply to function. A power supply problem can be a power cut or faulty power cables/sockets on both or one of the sensors.
- Dust on your lenses- If your garage is situated in a highly dusty area, the dust may pile up on your lenses, leading to a malfunction. The dust usually blocks the infrared beam emitted by the two sensors.
- Moisture- If there is a sprinkler near your garage or you live in areas that experience heavy rainfall, moisture could accumulate on your lenses and block them from functioning correctly.
- Misalignment- Garage door sensors will only work if they are perfectly aligned. If one sensor is moved out of place, the infrared beam will not reach the other sensor, which will render the entire system faulty.
- General wear and tear- If you have used your garage door sensors for an extended period , general wear and tear may be the cause of the malfunction.
Damaged Photo Eye Wiring
The wiring of the photo eye supplies it with the electricity it needs to function. If the wire is compromised, the sensor wont work.
As such, you need to be on the lookout for these danger signs:
- Frayed or corroded cords
- Loose connections
- Cracked, pinched, or pierced wire insulation
Addressing this issue can be tricky, but it can be done. In fact, heres a step-by-step video on how to replace the wiring by yourself.
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Are Garage Door Sensors Supposed To Be Green
All the garage door sensors are not supposed to be green. There are lights of different colors and functions on a garage door sensor.
For example, green light of the garage door sensor gives you the signal about the functionality of the sensor. When the green light of the garage door sensor is on, your garage door sensor is working accurately.
However, there are also other colors of light on the garage door sensor. Red light of the garage door sensor gives you an idea about the alignment of the sensor.
If the red light is on, then you can be sure about the accurate alignment of the sensors. Red light indicates at the perfect alignment of the garage door sensors.
On the other hand, yellow light of the sensor comes on to let you know about the transmission of infrared beam between the sensors. The infrared beam sent by the yellow light sensor is received by the green light sensor.
Finally, the orange light of the sensor signals you about the state of the wiring system. If the orange light of the sensor begins blinking, it means that there is something wrong with the wiring of the garage door sensor.
So all the different colors of sensors are unique and all of them are not supposed to be green. Only the green light sensor will be green and other will retain their color in any given situation.
Improper Closing Or Opening Of Doors

After pressing the button to open or close the garage doors, if the garage doors do not respond, then this could be a clear sign of damaged garage doors sometimes, it will be partially functional, and this also falls under the category of the damaged Garage doors.
It is difficult to determine the reason behind this problem as this is a technical problem, so the best you can do is to get in touch with an expert who can repair your garage doors.
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Schedule Dependable Garage Door Repair Services In San Diego
While they may seem relatively simple, garage door opener systems rely on quite complicated mechanisms to ensure proper performance of your door. If you have trouble aligning your sensors by following the steps above, dont try to inspect the issue any further on your own. Instead, seek assistance from trustworthy garage door technicians at Dlouhy Garage Doors. We handle all types of garage door repairs to restore your peace of mind.
Whether you live near Old Town, Downtown San Diego, or anywhere else in the area, you can rely on our technicians to provide expert assistance and guidance with all your garage door problems. Reach out to us today!
Sagging Garage Door Sections
The condition occurs when the garage door drops by a couple of inches. It is often a mistake that many homeowners overlook. The sagging door indicates a more significant problem that can cause harm to children, pets and vehicles. A sagging can mean many issues such as
Worn tension spring- A strained spring may lack the elasticity it once had thus may not carry out the function of holding the door at the correct height.
Dulled Rollers-The edges of the rollers can dull over time as the door goes up and down daily. It mainly occurs in rubber rollers hence should be replaced after a few years. Dulled rollers can lose their fitting within the tracks and sag under the weight.
Dulled tracks-At a certain period, the track may not function properly. On a particularly long trail, the edges may bend slightly outwards and lose their ability to hold the doors weight in place. Repeated friction can also cause dulled rollers to wear at the inner tracks.
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Testing A Garage Door Sensor
Determining the functionality of your garage door sensor is an imperative undertaking. The process of testing the functionality of the garage door sensors is pretty straightforward. It only takes a few minutes and can be performed by anyone to guarantee the overall safety of the garage door.
The testing process involves the assembling of any object like a box or brick. You then place the object directly on the ground in the path of the door. Activate the garage door opener to close the door with the object on its path. The door should automatically reverse after sensing an obstruction in its way, indicating that the door is functioning correctly. If the door closes on the object, the implication is that the door sensor is faulty. You will need to troubleshoot and determine the potential cause of the problem.
Why Is My Genie Garage Door Sensor Blinking Red
Your genie garage door sensor will blink red if something is wrong with the sensor alignment, dirty or faulty sensors, or when under high humidity. The patterns of blinking are the primary considerations. For instance, if the lights flash two times and pause, it can be due to obstruction or misaligned sensors.
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How To Bypass Garage Door Sensors
First of all, you will only be able to bypass your sensors from the wall button. Sorry, this is not a permanent hack of the opener. It will however, work on any garage door opener no matter the brand. It is not a good idea to have sensors that do not function properly. The opener may not be smart enough to know that there is nothing really in the way so we have to convince it we know better. So, all you need to do is hold the wall button down . You must hold the wall button all the way down until the garage door hits the floor then release. If you let go of the button before the door hits the ground the sensors will kick back in to action and the door will reverse. This will allow you to close the door and have it locked into the down position using the opener. Now at least you do not have to leave the door up all day or night.
What Does Garage Door Sensor Blinking Red Means
An infrared beam of light is used in the garage doors, which activates the electric motor by pressing the button on the remote, and then the electric motors enable a track-and-pulley system that facilitates in opening and closing of the garage doors.
There is a pair of LEDs that are attached to the garage doors when the LED is green, this indicates that the doors are working. If the garage door sensor blinking red, then there is an issue with the sensors common issues that cause the red light to blink on the garage doors are as follows:
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Faulty Garage Door Sensor Alignment
Your garage door has two sensors that need to line up in order for the system to work properly. If the lights are out of alignment, the sensors wont function right. If the sensors are misaligned, one or both of the sensor lights will appear red or fail to light up. You may be able to remedy this problem by tightening the bracket or screws holding the sensor in place.
Is Your Garage Door Light Blinking Continuously Heres What You Should Do

Posted on Last updated: February 4, 2022
Having your garage door light blink continuously is not only annoying, its also a sign that there is something wrong with the mechanism. There are several reasons why your garage door opener is doing this. The two most common reasons include a problem with the lock button and malfunctioning safety reversing sensors.
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How Do I Reset My Genie Garage Door Sensor
Your Genie garage door openers infrared sensor should blink twice before the door opens. You can reset the sensor by pressing the program key or up/down key on the device for five seconds. After the LED lights go off, the entire device should go dark. If the lights are still flashing, the error code you entered on the unit has been cleared and the system is ready to work.
First, you have to find the program set button on the unit. Then, press and hold it for 3 seconds. A purple or circle-shaped lead will illuminate. Then, press and hold the button again. If the sensor is blinking red, it is most likely because of a malfunction in the sensor bracket. If the issue persists, tighten the bracket. Then, try the next step: replace the battery.
The green light means the sensors are on. If the green light is blinking, its a good idea to replace the battery. The red light is a warning that the sensors are off. If theyre off, the door wont close or open. If the LEDs blink fast, youre probably in need of a replacement sensor. You can reset the sensor and your Genie garage door opener will work perfectly again.
How To Fix A Garage Door Sensor
Quick fixes for common sensor problems are discussed briefly above. Cleaning the sensor lens, tightening the sensor, replacing wires, or restoring power to the sensor may resolve your problem. However, if you cannot quickly and confidently fix the issue with your garage door sensor, you should as soon as possible. Your garage door can present a serious safety hazard that shouldnt be ignored.
If youre having trouble with your garage door, our team at Overhead Garage Door can help. We encourage Lake County and Chicagoland resident to contact us for assistance in diagnosing and repairing your garage door sensor, so you dont have to worry about safety issues with this part of your garage.
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Garage Door Opener Flashes
Your garage door opener is programmed with self-diagnostic capabilities which enable you to count the number of flashes and help identify your potential problem. This will give you a breakdown of the Liftmaster, Chamberlain, and Sears A/C model openers. These three brands make up the 70% types of openers that are sold in the country and are all diagnosed the same way.
*Click here if you would like to see the diagnostic chart breakdown for Linear or Genie garage door openers.
Diagnostic Chart, Symptoms, and Solutions:
One flash indicates that your safety sensor wire may be open, broken or disconnected.If your opener flashes twice, then your sensor wire is either shorted or the black and white wires could be reversed. In both cases, your safety eyes will not glow steadily. You should inspect the wiring for any staples or incorrect wiring. To test if your wires are shortened, you must detach the wires and reattach the sending eye and receiving eye separately to the opener to see which wire does not light. If the sensors are aligned and the lights glow, then the wires need replacement. If the lights do not glow, then the safety sensors need to be replaced.
Four flashes is the most common reason your opener lights may be flashing is because of your sensor eyes being misaligned. If an object has misaligned your sensor eyes then it breaks the electronic beam preventing the garage door to close properly. The door will stop and reverse back upwards.
What Are The Steps For Replacing Garage Door Sensors
The replacement is not that difficult and will only take 15-20 minutes. To replace garage door sensors, you need the following tools:
Step 1: Cut the cable to start replacing a garage door sensor
Step 2: Screw the nut to take off the sensor
Step 3: Remove the sensors base
Step 4: Split the cables and prepare them for the new sensor
Step 5: Split the cables of the new sensor and put them together properly
Step 6: Find the black cable to put them together
Step 7: Split them up to avoid contact between them and prepare some tape
Step 8: Be sure that the light stays steady
Step 9: Please put it back into place by pushing it a little
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How To Fix Yellow Light On Garage Door Sensor
A yellow light on your garage door sensor indicates that your safety reverse sensors are out of alignment. Your garage door will not close until they are fixed. Start by cleaning the lenses on both sensors and then adjust each sensor so that they line up perfectly with one-another.
Your garage door sensors are most often found a few inches off of the ground, one on each side of your garage door.
These sensors use something called a photo-eye system. Simply put, they shoot an invisible, infrared beam from side of your garage door to the other.
When you press the remote control that closes your garage door, a signal is sent to these sensors. Their primary purpose is to prevent your garage door from closing on something, or someone.
Your garage door only opens if the invisible infrared beam running across your garage door remains uninterrupted. But occasionally these sensors malfunction.
The key signs of a malfunctioning sensor is of course the yellow sensor light and the garage door not closing, or attempting to close and then quickly opening again. Followed by a flashing light from your overhead control box.
Blocked Or Dirty Sensors
You may also see the red blinking light if something is blocking the sensors eyes. Blocking one or both the sensors will break the beam. Once that happens, it affects the sensors ability to work properly, leading to the blinking issue.
The garage door sensors mounted on the tracks on both sides of the door are designed to work by each sensor sending out a signal across the doorway.
The first thing you may want to do is check for any physical objects sitting directly in front of either sensor. Removing such an object should restore normal functioning unless there is another malfunction.
If there are no obvious obstructions, a dirty lens might be the culprit. Thankfully, this problem is one of the easiest to fix.
Use a clean, lint-free cloth to wipe the sensors to remove any accumulated dirt blocking them. It is important to be careful while cleaning the sensors because the eyes have a glass that could break if handled with little care.
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The Importance Of Garage Door Sensors
Garage door sensors are more than just a convenient element of your door, theyre a critical safety feature for your home. Between 1982 and 1992, garage door accidents caused about eight deaths per year among children under the age of 15. In 1990, President George H. W. Bush signed Public Law 101-608, the Consumer Product Safety Improvement Act of 1990. This federal legislation mandates that all garage door openers produced after 1993 meet the requirements set forth in UL325.
It takes only a moment for a child or pet to scurry beneath a garage door. A single garage door typically weighs at least 130 pounds, and a double door with windows will weigh closer to 350 pounds. Its crucial that you keep proper protections in place to prevent your garage door from closing accidentally when an obstruction is in the way.