Blog

Garage door sensors are essential to your garage door’s safety system, ensuring that the door only closes when the path is clear. These small but powerful components detect if an object, person, or pet is in the way, stopping the door from closing to prevent accidents or damage. Without properly aligned sensors, though, the garage door might not close as it should, leading to issues like the door reversing suddenly, refusing to close, or showing a blinking sensor light. These are common signs that your sensors need realignment.

Luckily, with a few tools and a step-by-step approach, you can often realign your sensors yourself. Proper alignment keeps your garage door functioning safely and smoothly, helping you avoid potential issues down the road. In this guide, we’ll cover the tools you need, the process for repositioning and leveling the sensors, and tips for testing alignment to make sure your garage door is back in top working order.

How to Recognize When Your Garage Door Sensors Are Misaligned

Misaligned sensors can prevent your garage door from functioning smoothly, and sure signs can help confirm this is the problem. Here’s what to look for:

• Blinking or Flickering Sensor Light: If one or both sensor lights are blinking or flickering, this often indicates misalignment. Properly aligned sensors will show a steady light.
• The Garage Door Reverses Mid-Close: If your garage door starts to close but suddenly reverses, it could be because the sensors are detecting an obstacle — or think they are due to a misalignment.
• The Garage Door Refuses to Close Completely: If your garage door stays open and won’t close, this is another sign that the sensors may need realignment to detect a clear path.

Step 1: Power Off the Garage Door Opener

For safety, disconnect your garage door opener from its power source. Turning off the power prevents accidental activation while you’re working.

Step 2: Locate the Garage Door Sensors

Garage door sensors are typically installed on each side of the garage door, about 4-6 inches above the ground. Each sensor will be housed in a bracket and should have a small LED light that indicates its status.

Step 3: Loosen the Sensor Brackets

Using your screwdriver, loosen the brackets holding each sensor in place. You don’t need to remove them entirely; just make sure you can easily adjust the sensors.

Step 4: Align and Level the Sensors

1. Use a Level: Place a level on each sensor to ensure it’s positioned horizontally. Proper leveling is essential for accurate alignment.
2. Measure for Equal Height: With a measuring tape, check that both sensors are at the same height on either side of the garage door. They must be perfectly level for the sensors to work correctly.
3. Adjust the Sensors: Gently adjust the sensors until their LED lights turn solid, which typically indicates proper alignment. In most models, a green light means the sensors are aligned, while a red or blinking light signals an issue.

Step 5: Secure the Sensors in Place

Once both lights are solid and the sensors are level, tighten the screws on each bracket to secure them in position.

Step 6: Test the Sensors

To confirm the sensors are working, reconnect the garage door opener’s power and test the door:

• • Close the Door: Try closing the garage door. If it closes without reversing or hesitating, the alignment is likely correct.
  • Block the Sensor Path: Place an object in the sensors’ path and then attempt to close the door. It shouldn’t close if the sensors detect an obstruction.

Garage Door Sensor Troubleshooting Tips

If your garage door still won’t close after realigning the sensors, try these quick troubleshooting tips:

• • • Clean the Sensors: Dust, dirt, or cobwebs can interfere with the sensors. Use a soft cloth to clean the lenses gently.
    • Check for Sunlight Interference: Sometimes, direct sunlight can disrupt the sensor signals. If possible, add a small shade or cover to block excess sunlight.
    • Examine Wires: Inspect the sensor wiring for any damage or loose connections. Damaged wires may require professional repair or replacement.

Keep Your Garage Door Sensors in Top Condition with American Garage Door

Regular maintenance, including sensor alignment, is essential for the smooth operation of your garage door. American Garage Door offers everything from routine checks to complete garage door installations. And with our 24-hour emergency service available in the Denver metro area and the Front Range, you can count on us to be there when you need us most. If you’re experiencing any issues with your garage door, don’t hesitate to contact us today to keep it operating safely and efficiently!