Genie Garage Door Sensor Blinking Red 3 Times: Causes

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If you have Genie garage door openers, you are undoubtedly familiar with the standard security sensors on all models. These sensors protect you and your property by detecting when something is blocking the door as it closes, preventing it from closing and potentially causing harm.

However, this safety sensor feature can be confusing when they start to blink red. Today. We’ll explain why your Genie garage door sensors are blinking red three times, and we’ll also provide tips on troubleshooting the issue quickly and efficiently. 

Genie Garage Door Sensor Blinking Red 3 Times

A Genie garage door sensor blinking red three times indicates something is in the way of the garage door. The safety door sensor is designed to prevent injury or damage due to a door closing on an object or person.

However, there are several reasons why your Genie garage door could be blinking red three times, it’s important to take the necessary steps to identify and address the issue. Here are possible reasons why your Genie garage door could be blinking red three times.

1. Sensors Out Of Alignment

If the sensors are out of alignment, it can cause the garage door sensor to think that something is blocking the door from closing, which will cause it to stop and the lights to blink.

To fix this issue, check to ensure that the sensors are mounted correctly and that nothing is blocking the sensors. If the sensors are mounted correctly, and there are no obstructions, the sensors may need to be realigned.

2. Blocked Or Dirty Sensor 

The blocked or dirty sensor is a common cause of Genie garage door sensors blinking red three times. A blocked or dirty sensor means that the sensor cannot read the open/close status of the door.

It is recommended that you check the sensor and its surroundings and clean or remove any obstructions that may be blocking it. Additionally, you may need to replace the entire sensor if the issue persists. 

3. Excessive Humidity

Excessive humidity in the environment can be a major factor in why your Genie Garage door sensor blinks red thrice. The humid air can cause condensation on the sensor, which can result in the sensor sending unreliable signals.

Additionally, humidity can cause the sensors wired to corrode, leading to further complications and issues. To reduce the risk of malfunction due to excessive humidity, keep the sensor dry and check the wires periodically for signs of corrosion.

Also, you can purchase a dehumidifier for the garage door sensor to help reduce the area’s humidity and keep the sensor from sending wrong signals.

4. Faulty Sensors

If any of the above reasons are not why your garage door sensors are blinking red three times, then it could result from faulty sensors. This can be a sign of a malfunction or misalignment of the sensor.

Can I Replace My Genie Garage Door Sensors?

Yes, you can replace your Genie garage door sensors. However, how easy it will be to change them depends on the type of Genie garage door opener you have. Newer model sensors are easier to change. You can even replace them without the help of a professional.

However, you may need to contact a garage door technician to install compatible sensors if you’re using an older model. Ultimately, replacing the Genie garage door sensors is a straightforward process and should not require the assistance of a professional for most Genie Garage doors.

Step-By-Step On How To Replace Your Genie Garage Door Sensor 

Replacing the sensor on your Genie garage door is a relatively straightforward process that can be accomplished in just a few steps. However, ensure you have the correct tools before starting this task. Ensure you have work gloves, pliers, tweezers, screwdrivers, and protective glasses.

With the right tools, the following steps will guide you through the process of replacing the garage door sensor:

Step 1: Disconnect The Power 

When replacing a Genie Garage door sensor, the first step is to disconnect the power to ensure your and your property’s safety.

Disconnecting the power can be done by unplugging the power cord from the electrical outlet or the power source or by turning the circuit breaker off.

Step 2: Connect The Replacement Sensors 

After disconnecting the power, the next step is to remove and disconnect the old sensors and connect the new replacement sensors. Ensure that the wires are connected to the right terminals and that the connections are secure.

Once the connections are established, the sensors should be tested to make sure they are working properly 

Step 3: Return The Sensors To The Bracket 

Once all the wires have been connected, each sensor should be carefully placed back into its metal bracket and securely fastened with screws. Before proceeding to the next step, it is recommended to use a level to ensure the two sensors are properly aligned.

Step 4: Power The Sensor And Test Them 

Once you’ve successfully replaced the Genie garage door sensor, it is important to power the sensor and test it to ensure it properly functions. To power the sensor, connect the power cable to its appropriate power source and test the sensor.

Start by opening and closing the door, ensuring the sensor properly detects the door’s movement. The sensor should also be tested for accuracy by opening and closing the door from various distances and angles to ensure that the sensor is registering it correctly.

What Color Should Genie Garage Door Sensor Be Blinking?

Genie Garage door sensors typically have a green blinking light when functioning properly. This light indicates the sensor is properly connected and actively sending and receiving signals.

If the garage door blinks red, something is blocking the sensors, or the sensor’s alignment is off. Ensure you check the connections and ensure the sensor is properly connected and aligned. 

Will Genie Garage Door Work Without Sensors?

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Yes, it’s possible to operate a Genie garage door without sensors. However, this is not recommended, as sensors are the most secure and efficient way to operate the door. Sensors are designed to detect any obstructions in the door’s path, ensuring that it will not close on an object or person.

Without the sensors, the door could not sense obstructions which could result in a dangerous situation. 

Can I Open A Genie Garage Door With My Phone?

Yes, you can open a Genie garage door with your phone. Some Genie garage door openers have an integrated Aladdin Connect feature that allows you to control your garage door opener with your smartphone.

The app allows you to monitor and control your garage door from anywhere. You can also receive notifications when the garage door is opened or closed.

Are Genie Garage Door Sensors Universal?

There’s no definitive answer to whether Genie garage door sensors are universal. Generally, Genie garage door sensors are universal or not, depending on the type of Genie garage door opener you have.

The Genie Intellicode wireless keypad and garage door opener systems use a rolling code generated from the wireless keypad. The sensors are not universal if you have a Genie Intellicode system, as they are coded to the specific Genie opener.

However, some Genie openers, such as the Genie Chain Drive Model 7155, use a fixed code system. With this type of Genie opener, the sensors can be used with multiple Genie openers, as the code is the same for all Genie openers.

Furthermore, Genie offers a wide selection of compatible sensors, including wired and wireless models. Additionally, Genie offers a compatibility chart on its website that can help you determine which sensors will work with your opener. If you are unsure which sensors are compatible with your Genie opener, it is best to contact a garage door technician for assistance.


Having a functioning garage door is something that many homeowners like to enjoy daily. As an owner of a Genie opener, you may have noticed the sensor light flashes red three times when you attempt to open or close the door. 

This can be an unnerving experience, as you’re left wondering why the sensor is flashing and what it means. Understanding the causes of the red light blinking can help you determine the best action. 

We’ve discussed why your Genie garage door sensor keeps blinking red three times and how to address the issue. We’ve also provided tips on how to prevent the red light from occurring in the future. We hope this article answers and solves your Genie Garage door sensors blinking red three times. 

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Written by Timothy Amin

Timothy is a seasoned expert when it comes to garage doors. With over 15 years of experience in the industry, John has installed, repaired, and maintained countless garage doors of various types and styles.