How To Fix A Broken Garage Door Sensor

Having a broken garage door sensor can be quite frustrating, especially when you’re in a hurry. It is an essential safety feature in every garage door, ensuring that the door retracts if something is in its path. However, don’t worry. In this guide, we’ll take you through the steps to troubleshoot and fix your faulty garage door sensor.

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Steps to Fix a Broken Garage Door Sensor

  1. Inspect for Physical Damages
    • Begin by visually inspecting the sensor. Check for obvious signs like broken or frayed wires, or damage to the sensor’s casing.
  2. Clean the Sensor Lens
    • Dust and debris can obstruct the sensor’s infrared beam. Gently clean the lens with a soft cloth or tissue.
  3. Realign the Sensors
    • Misaligned sensors are a common issue. Ensure that both sensors face each other directly and are at the same height.
  4. Check the LED Indicator Lights
    • Most sensors have LED lights that indicate their status. If one is off or blinking, it indicates a problem. Consult the manual for specific light patterns and their meanings.
  5. Test the Garage Door
    • After making adjustments, test your garage door to see if the issue is resolved. If not, continue troubleshooting or consider contacting a professional.
  6. Replace the Sensor
    • If none of the above steps work, your sensor may be faulty and need replacement. Always ensure you purchase the right sensor for your garage door model.

Table: Troubleshooting a Broken Garage Door Sensor

Problem Possible Cause Solution
Sensor not lighting up – Power loss – Faulty wiring – Check power source – Inspect and replace wiring
Door doesn’t close – Obstruction in path – Sensor misalignment – Remove obstruction – Realign sensors
Blinking sensor light – Lens is dirty – Sensor is misaligned – Clean the lens – Adjust the sensors
Door reverses suddenly – Sensor is detecting an obstruction – Faulty sensor – Ensure the path is clear – Consider sensor replacement

FAQs about Garage Door Sensors

1. How do I know if my garage door sensor is bad?

Common indications include the garage door not closing completely, the sensor lights not turning on or blinking, and the door reversing suddenly without any obstructions.

2. How long do garage door sensors typically last?

With proper care, sensors can last up to 10 years. Regular maintenance and cleaning can extend their lifespan.

3. Can I bypass the garage door sensors?

While it’s technically possible to bypass sensors, we don’t recommend it. They are crucial safety features designed to prevent accidents.

4. Are garage door sensors universal?

Not necessarily. It’s always best to check the brand and model of your garage door opener to get a compatible sensor. Always refer to the manufacturer’s recommendations.


Fixing a broken garage door sensor doesn’t have to be a daunting task. With a bit of patience and the right knowledge, you can quickly restore your garage door to its optimal working condition. If you’re unsure or think the problem might be more extensive, always rely on trusted professionals to handle the repair. Remember, regular maintenance can prevent many common issues with garage doors. If you need help or have further questions, please don’t hesitate to contact us. Your safety and satisfaction are our top priorities.

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Michael Williams

Michael Williams

Over a decade in the garage door business has taught me that the most professional way to go is transparency with my clients. Why charge clients when they can clearly solve some of their garage trouble DIY? In this blog I will share as much as I can. If you still need help, don't hesitate to call!