How Can I Tell If My Garage Door Opener Sensor Is Bad?

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  • Author Ricky Ray
  • Published May 8, 2024
  • Word count 652

A malfunctioning garage door sensor can be a real nuisance. It can prevent your door from closing completely, which can pose a security risk and leave your car vulnerable to the elements. In some cases, a faulty sensor can even prevent the door from opening at all, leaving you stranded in your driveway.

If you're suspecting trouble with your garage door sensor, don't panic! Here at Great Value Garage, we're here to help. In this blog post, we'll discuss some of the telltale signs of a bad garage door sensor and guide you through some simple troubleshooting steps.

Understanding Garage Door Sensors

Most modern garage door openers use a pair of sensors, typically located near the bottom corners of the door frame. These sensors emit an invisible beam (usually infrared) that creates a safety zone. When the door is closing and this beam is broken by an object or person passing through the doorway, the door will automatically reverse course to prevent injury.

Signs of a Faulty Garage Door Sensor

There are several indicators that your garage door sensor might be malfunctioning. Here are some of the most common ones:

The door doesn't close all the way: If your garage door seems to struggle to close completely, shutting off a few inches before reaching the ground, it could be due to a faulty sensor.

The door opener is programmed to stop if it detects an obstruction in the path, and a misaligned or malfunctioning sensor can mimic this obstruction.

The door reverses for no reason: If your garage door starts reversing direction unexpectedly, even when there's nothing blocking its path, it could be a sign that one of the sensors is misaligned or sending a faulty signal.

The door won't open with the remote: If you're pressing the button on your remote control but the door isn't responding, it doesn't necessarily mean the problem lies with the remote itself. A malfunctioning sensor can disrupt the signal between the remote and the opener.

The sensor light isn't illuminating: Most garage door sensors have a small LED light that illuminates when the sensor is functioning properly. If this light is dim, flickering, or not turning on at all, it could be a sign of a failing sensor.

Troubleshooting Tips

Before you replace your garage door sensor, there are a few simple troubleshooting steps you can try:

Check for misalignment: Over time, vibrations and movement can cause the sensors to become slightly misaligned. Use a level to ensure both sensors are straight and facing each other directly. Even a minor misalignment can disrupt the sensor beam.

Clean the sensors: Dirt, dust, and cobwebs can accumulate on the sensor lenses, interrupting the beam. Use a clean, dry cloth to gently wipe down the lenses of both sensors.

Inspect the wiring: Loose or damaged wires can also cause sensor malfunctions. Carefully check the wiring for any signs of fraying or corrosion. If you're not comfortable working with electrical components, it's best to call a professional garage door technician.

When to Call a Professional

If you've tried the troubleshooting steps above and your garage door sensor is still malfunctioning, it's time to call a professional technician. A qualified technician from Great Value Garage can diagnose the problem quickly and efficiently and recommend the best course of action, whether it's repairing the existing sensor or replacing it with a new one.

Great Value Garage: Your Local Garage Door Experts

At Great Value Garage, we understand the importance of a properly functioning garage door. Our team of experienced and certified technicians is here to help you with all your garage door needs, from installation and maintenance to repairs and replacements. We offer a wide variety of garage door sensor options to ensure your door operates safely and securely.

If you're experiencing problems with your garage door sensor, don't hesitate to contact Great Value Garage today. We're always happy to help!

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