How To Fix A Broken Garage Door Sensor

Dealing with a broken garage door sensor can be frustrating, but with the right guidance, you can tackle the issue yourself. Here’s a detailed walkthrough to get your garage door sensor functioning correctly.

Step-by-Step Guide to Fixing Your Garage Door Sensor

Step 1: Safety First

Before you start, ensure the garage door is in manual mode to prevent any accidental closing or opening. Also, wear safety goggles and gloves.

Step 2: Clean the Sensors

Dust and debris can block the sensor’s eye. Use a soft cloth and a mild cleaner to wipe the sensors clean.

Step 3: Check for Obstructions

Remove any items that might be blocking the sensors’ line of sight.

Step 4: Ensure Proper Alignment

Garage door sensors should be facing each other. If they are misaligned, they can’t communicate properly.

Step 5: Adjust the Sensors

Loosen the screws that mount the sensors to their brackets and adjust them until they are pointing directly at each other.

Step 6: Check Wiring

Inspect the wires for any signs of wear or damage. If you find any, replace the wiring or call a professional.

Step 7: Test the Sensors

Block the sensors with an object to see if the garage door responds correctly. If the door does not attempt to close, the sensors are working.

Step 8: Re-Engage Automatic Mode

Once everything is aligned and working, switch the garage door back to automatic mode.

Detailed Troubleshooting Table

Symptom Possible Cause Solution
Garage door won’t close Sensor path blocked Remove any obstructions
Flashing sensor lights Sensors misaligned Adjust sensors to align properly
No lights on sensor Power issues or bad sensors Check power source or replace sensors
Sensors desynchronized Wiring issue Inspect and replace damaged wires

Remember, if you’re not comfortable with these steps or the problem persists, it’s time to call a professional.

Why Choose Us

You need a dependable team when your garage safety is at stake. Here’s why you should choose us for your garage door repairs:

Service Areas

  • Edmonton
  • Beaumont
  • Sherwood Park
  • St. Albert
  • Spruce Grove
  • Saskatchewan
  • Northwest Edmonton
  • Southeast Edmonton
  • West Edmonton

For detailed service areas, visit our service areas page.

Frequently Asked Questions

How can I tell if my garage door sensors are not working properly?

If your garage door isn’t closing, or if it reverses immediately after starting to close, your sensors may be malfunctioning. Other signs include blinking lights on the sensor or no lights at all.

Can I replace garage door sensors on my own?

Yes, you can replace the garage door sensors on your own if you have basic handyman skills. You’ll need to purchase the correct sensors for your garage door model, shut off the power to your opener, and follow the manufacturer’s instructions for installation.

What is the average lifespan of garage door sensors?

Garage door sensors typically last about 10-15 years. However, their lifespan can be shorter if they are exposed to extreme weather conditions, physical damage, or electrical surges.

Should I repair or replace my broken garage door sensors?

It depends on the issue. If the sensors are dirty or misaligned, a simple cleaning or realignment should fix the problem. If they are damaged or very old, it might be more cost-effective to replace them.


In conclusion, fixing a broken garage door sensor is a task that you can often handle yourself. However, for the best results and to ensure your safety, consider reaching out to Legion Garage Doors. Our team has the expertise to handle any garage door sensor issues, along with a wide range of other garage door repairs and installations. Contact us to guarantee your garage door operates smoothly and safely.

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