Fix A Garage Door Sensor With A Yellow Light (Easy Way)

Fix A Garage Door Sensor With A Yellow Light

Are you having trouble with your garage door sensors? If so, you’re not alone. Many homeowners experience issues with their garage door sensors, making it difficult to open and close the door properly. Fortunately, there are some simple fixes that can help resolve these issues quickly and easily.

In this blog post, we’ll discuss the most common reasons why garage door sensors have yellow lights flashing or blinking on them and how to troubleshoot them. We’ll also talk about what type of repair may be necessary if a yellow light is constantly blinking or if your door won’t open or close.

Finally, we’ll cover how to replace old sensors with new ones as well as tips for avoiding yellow light issues in the first place. So let’s get started!

Yellow Light on Garage Door Sensor Issues

What is a Garage Door Sensor and How Do Garage Door Sensors Work?

First, let’s talk about what garage door sensors are and why we have them on our garage doors in the first place.

Garage door sensors are devices that help make sure the garage door closes safely. They use an infrared beam (laser) to stretch across the length of the garage door opening – just a few inches off the ground – and have a green light and a yellow (or amber) light, which can flash if there is a problem. An example of a problem might be if there is an obstruction that could be crushed if the garage door were to close on it.

In other words, we use garage door sensors because they help prevent accidents and keep people and property safe. It is a safety precaution that has saved lives many times over.

What is the Yellow Light on a Garage Door Sensor and Why is it Blinking?

The yellow light on a garage door sensor is typically an indication of something not working properly. However, just like with any sensor, it could alert the user of trouble that is either real or perceived. This means that sometimes the sensor senses real danger and other times it’s a false alarm.

Let’s do a little troubleshooting and look at some of the most common reasons for yellow flashing lights on your garage door sensor:

Problems with Alignment

The yellow light on the garage door sensor can indicate that the sending and receiving sensors are not properly aligned. A problem with alignment will cause the garage door not to close when you prompt it to, using a garage door opener button on your remote control. This problem typically causes a yellow flashing light, rather than a yellow solid illumination, and is often accompanied by a clicking sound as well.

To fix this issue, you’ll need to adjust the alignment of the sensors by loosening or tightening the wing nut on one of them with a wrench, so that the laser can reach both sensors.

Object in the Way

Another common reason for yellow lights to blink is that there may be an object in the way of the sensor’s infrared beam. This could be something like a bicycle, toy, or other object placed between the sending and receiving sensors. It could even be a person who is standing there or walking through the opening and trips the laser and sends a signal to the garage door opener to stop the motion of the door.

Thankfully, in this situation, removing the object should solve this problem.

Dirt on the Sensor Lenses

The yellow light might also be flashing due to dirt, dust, or other debris on one lens (or both) of the garage door sensors. This is a very common issue since dirt and dust can accumulate quite quickly, especially when one lives in an open area with lots of wind and activity.

To clean the lenses of your garage door sensors, we recommend simply using just a soft cloth, and maybe some water or window cleaner if you absolutely need to. Make sure you don’t use any abrasive materials that could scratch the sensor lenses!

Wiring Connections are Loose or Damaged

Wiring Connections are Loose or Damaged
Image Credit: garagetransformed

It’s possible that you may also see yellow lights blinking due to wiring connections that are loose, damaged, or disconnected. There are white wires that extend from each of the garage door sensors, which attach to wires coming out of the home. This allows the safety sensors to receive power in order to function.

Check for broken sensor wires or frayed insulation on both the sending sensor and receiving sensors’ wiring connections and make sure that they are firmly connected in their respective terminals. If you do find a damaged wire, then you should replace it for safety reasons. Only then will the yellow light stop blinking.

Broken Garage Door Sensors

Finally, yellow lights blinking on garage door sensors can indicate that the sensors themselves are broken. This is another common reason for yellow flashes and perhaps the most frustrating to fix as you may need to replace both sending and receiving sensors with new sensors. However, if you have tried all of the other options and you still can’t figure out why your garage door won’t open and close correctly – and that yellow light won’t stop blinking – then this may be your best option.

Replacement garage door sensors can be found in many local hardware stores and online as well. They should be fairly easy to find, but if you are uncomfortable with how to change out old garage door sensors with new ones, then it’s best to have a professional take a look at your garage door setup. They should also be able to make any necessary wiring connections or bracket adjustments if needed after replacing the sensors.

How to Prevent the Yellow Light from Coming On in the Future

How to Prevent the Yellow Light from Coming On in the Future
Image Credit: mistergaragedoor

Now that we’ve figured out how to fix or replace your garage door sensors, you will want to understand how to prevent that little yellow LED light from coming on again in the future. There are several precautions you can take in order to make that happen. Let’s look at a few of them:

Remove Objects in the Way

The first thing you should do is to always make sure that no objects are in the way of the infrared beam. This means you should never leave any toys, bikes, or other items in front of the garage door sensors and should always put things away when done playing with them.

Additionally, always take into account where every person or pet is before trying to close the garage door – the last thing you want is for a baby carrier, a lounging cat, or a running toddler to be in the way as the garage door tries to go down.

Clean Sensor Lenses Regularly

You should also make sure that your garage door sensors are frequently cleaned of any dirt and dust that may accumulate on the lenses.

You can use your thumb if it’s just a little bit dusty, or you can use a soft cloth and maybe some window cleaner once in a while if the grime has really built up on the sensors, which could happen if the garage door was open during a messy storm or in some other way exposed to the hard elements outside.

Check Wiring Connections Often

Finally, you should check all wiring connections to ensure they remain tight and connected properly, with no broken wires or frayed insulation. You will especially want to check these wires often if you have small children running around who are often curious and getting into things. Those wires are right there in the open, easy to reach and tempting to pull on!

If a wire comes loose or gets damaged, it’s best to have a professional come in and replace the wire if needed, if you are not comfortable doing it on your own, as electricity can be dangerous if you work with it incorrectly.

Frequently Asked Questions about Garage Door Sensors and the Yellow Light

Frequently Asked Questions about Garage Door Sensors and the Yellow Light

Now that you know more about yellow light errors on garage door sensors, here are some of the most frequently asked questions to further help you troubleshoot any yellow light issues:

Q1: Do I Need to Hire Someone to Fix My Garage Door Sensor?

In most cases, yellow light flashes are related to simple issues which can easily be solved with some troubleshooting. However, if yellow light flashes persist, it’s best to have a professional take a look at your opener to ensure all wiring connections are secure and that there isn’t any other underlying issue causing the yellow lights.

Q2: Can I Just Ignore the Flashing Yellow Light?

Overall, yellow light flashes on garage door sensors should not be ignored as they can often be indicative of something more serious and require an experienced eye to identify and fix. If you need assistance with yellow light errors on your garage door sensor, contact a local garage door specialist for help today!


In conclusion, if you’re experiencing issues with your garage door opener, it’s important to understand the most common reasons why this may be happening in order to know how to troubleshoot and repair the issue. These include problems with alignment, obstruction of the infrared beam, dirt buildup, and more, and most of them are very easy to fix.

With these tips in mind, you’ll be sure to get your garage door working properly again in no time!

What other garage door sensor questions do you have? Let us know in the comments.

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