How To Replace Garage Door Sensor

Your garage door sensor is a crucial safety component that prevents the door from closing on your vehicle or other obstacles. If your sensor is malfunctioning, it's important to replace it promptly. Here's a step-by-step guide to help you replace your garage door sensor:

Step 1: Safety First

Before you begin, disconnect the power to your garage door opener. This will prevent the door from accidentally activating while you're working.

Step 2: Locate the Malfunctioning Sensor

Most garage doors have two sensors, one on each side of the door opening. The sensors emit invisible beams that create a protective field. If an object breaks the beam, the door will automatically stop closing.

To locate the malfunctioning sensor, slowly close the garage door while watching the sensors. The sensor that's not emitting a beam is the one that needs to be replaced.

Step 3: Remove the Old Sensor

Once you've located the faulty sensor, remove the screws that hold it in place. Gently pull the sensor away from the wall or mounting bracket.

Step 4: Disconnect the Wires

Your sensor will be connected to two wires. Carefully disconnect the wires by pulling them straight out of the sensor terminals. Make sure not to damage the wires.

Step 5: Install the New Sensor

Take the new sensor and position it in the same location as the old one. Secure the sensor using the screws provided.

Step 6: Connect the Wires

Connect the wires to the terminals on the new sensor. Make sure to connect the wires to the correct terminals: red to red and black to black.

Step 7: Test the Sensor

Reconnect the power to your garage door opener and slowly close the door. The door should stop closing when it reaches the sensor's beam. If the door continues to close, check the sensor's alignment and wiring.

Step 8: Adjust the Sensor

Once the sensor is installed and tested, you may need to adjust its height or angle. Use the adjustment screws on the sensor to position it so that the beam crosses the opening at the desired height.

Tips

Here are a few tips for replacing a garage door sensor:

Use a level to ensure that the sensor is installed straight.
Tighten the screws securely, but avoid overtightening.
If you're not comfortable working with electrical wiring, it's best to call a qualified electrician for assistance.
Test the sensor regularly to ensure that it's functioning properly.

Conclusion

Replacing a garage door sensor is a relatively simple task that can be completed in less than an hour. By following the steps outlined in this guide, you can ensure that your garage door operates safely and efficiently.